Here's a link to your tvfool analysis:
http://www.tvfool.com/?option=com_wr...c572c41b6ef2b6
It looks like your signals are very strong. You are only about 6 miles from WHP and WITF. You're about 10 miles from WHTM.
Your problem might be due to the signals being too strong and thus overloading your amp. I suggest you try your antenna with the amp completely removed from the setup. At this range, and amp should be unnecessary. The amp could be making things worse rather than better.