Loosing signal strenght of satelite 129

Have two dish one on top of the roof (chimney) and one on the side of the house special for HD satelite 129 The dish on top (chimney) takes good care of 110 and 119 I think they are both 500. I had the one on the side repeaked and adjusted but still loss of signal (not permanently) I live in the top N.W of the Stae of Washington. Would I get a better signal if I replaced the one on the side with a dish 1000.2 and use that one only for the 129 satelite although the 1000.2 can be doing the job for all three 110;119;and 129. I f you have a better solution than mine please fire away I am just a layman and all your expert information is highly appreciated. Thank you very mmuch for your cooperation with kind regards Harold Rock