Agitator is coming loose, cloths are twisted up when done

That does not sound good. New dogs sound great, but you must get to the bottom of why the clothes are becoming twisted on the agitator. Usually not enough WATER. Think loose flow of clothes submerged.
Long story short, you cannot jam pack this machine. Less clothes, more water, will equal long life.
Be sure that the mating teeth for the dogs, is not damaged. Slipping here would make loud noise.
More water, less clothes.

about an inch ushould be able to screw the bolt back in its usually a 7/16 bolt and nut

The nut that holds the agatator on has come loose and is properly floating around in the agitator.Or it just needs to be pushed down to lock it in place. At worst the bolt and nut has rusted away. (repair man)

on top of the agitator should be a cap you can pry off and you will see a nut which has probably come loose, and you just have to tighten.

lift out the softener cup located on top of the agitator,there is a 7/16" nut bolted down into the agitator spline that may have come loose

Remove the top cap on the agitator and see if the bolt has come loose. If it is not there, the agitator will come loose from the gear case shaft and free spin.

Sounds like the bolt is rusted on. Try a few things.

• Heat the bolt and nut with a propane torch. Tap the nut with a hammer or punch as it cools. Try it now.
• Take a hacksaw and make a diagonal cut across a face of the nut. Be careful not to get into the threads too much. Cutting the nut will relieve the pressure on the bolt. You may need to cut a second face of the nut also.

Let us know how things turn out.
Please rate this solution. Thanks

Ok, sorry it took so long to write.  You listed the washer as a Calypso, but it didnt look righ, so did some investigative work for you.  What your describing I believe, is that the agitator top half (or the auger as well them) is sitting still and the bottom half if moving.  During the wash cycle, the top half is just sitting still.  If this is wrong, please let me know.  If this is right, you have a sort of simple fix.  Remove the top cap of the auger, pry gently between the cap and the agitator, the plastic cap will come off.  When you remove the cap, you will see another cap (sometimes you do, sometimes you dont) it will be white or dirty clear in color if its there.  You can put your finger on the lips and lift it straight off.  Then you will see a cap with a bolt in the center.  Remove this bolt (7/16" with long extension).  the agitator dogs (Sears part #387091) .  You should see these under that last cap tha had the bolt in it.  Remove the auger (just slide it up and off), remove the dog holding cap.  Remove the dogs, but be sure you remember the way they go back in.  Next is the tricky part.  Take the cap upside-down, and place it back in the auger.  Quickly turn it back over, making sure the ag dogs dont fall out of position (you will be hating me the first couple time, just keep at it), then, with a long pair of needle nose, place the bolt you removed back in the hole.  Take your extension with socket, hold the bolt firmly, and slide the auger back on to the top of the agitator.  Make sure the locks and stuff fit right between the two.  Tighten the bolt (just snug, DO NOT OVERTIGHTEN, you will split the cap).  If all goes well and right, you should be able to roll the auger one way and not the other.  If you need any further help, or need someone to yell at when the dogs keep falling out, give me a shout, and we'll help you along.  Good Luck!!!!!     Jim

check and make sure the agitator hasnt come loose or broken pull up on it and see if it comes out if not the bolt is in it, then grab ity and twist it do you feel any drag on it if not look under the machine and see if the pully has slipped down or if something looks loose. you should norice any problem

(Roper is actually made by Whirlpool) This is simpler than it sounds, just takes time and a few steps. Do you have a fabric softener dispenser that resides on top of the agitator? This dispenser simply snaps onto the top of the agitator. Some styles use a decorative cap. To remove the dispenser, simply grab it and firmly pull up. There is a cap that covers the bolt or nut that holds the agitator in place. To remove the agitator cap, insert a small flat-head screw driver into the seam between the agitator cap and the upper agitator (the part that moves). Use a twisting or prying action to pop the cap off of the agitator. Sometimes there is a little slot where you can insert the screwdriver. Look for it first. There maybe an internal debris cap under this: Inside the agitator you will see a cap with a raised handle. Simply reach into the agitator and twist the cap while pulling up. This will remove the cap and its o-ring. Removing the agitator: When looking into the agitator assembly, you will notice a single nut in the center of the agitator. Use a socket kit or nut driver to remove this bolt or nut from the agitator stud. Don't use plyers, it'll just mess up the nut. With the bolt removed you should be able to remove the agitator by simply pulling up. Twist back and forth CW & CCW when lifting. Some are a 2 piece design, so pulling up will actually remove either the whole agitator assembly or only half of it. If whole assy comes up and you may need to seperate the two for your new parts. Place the Lower Agitator on the floor and stand on the flat lip. Then Pull up to separate the Upper Agitator (mover) from the Lower Agitator. As far as your parts go I'm not sure where they go without seeing it myself. There is a spline or ratch assembly which causes the agitator to move back and forth. They are usually made of plastic and get worn or break. This might be what you are replacing. It's not clear as to what parts they gave you. Good Luck