the kidd.
I noticed in your picture of the 20 yard group that your arrows are spread out horizontally(left to right).That is a sign of your centershot being off.I didn't say anything because you are still learning about shooting and thought it might just be you but after what you just posted here,I am fairly sure you need to make some centershot adjustments.
read my post and follow some of the suggestions I make and I think you will se the problem disappear.
http://www.huntingnet.com/forum/tm.aspx?m=2020182
Talk about a hijack sorry[8D]