Paper folder grabs too many sheets and doe...

Not sure what make / model you have but folders are pretty much the same. The issue with the paper feed is your retarder, also known as the paper seperator. On the feed table where you load paper there should be a pad or rubber wheel. Look for an adjustment screw. You need to close the gap enough so that it only takes one sheet at a time. The extra fold sounds like you need to adjust the fold plate stop positions just a hair. If you give me the make and model I should be able to email you a manual.