This issue is now something from the 1960's when folk started to get more than one TV to discover that one set would pull in more or less channels than the next TV.

Fast forward to today where folk are so used to cable TV where that issue was solved and now with some moving back to antenna, this question comes back to haunt all.

There is no solid fix except to go back to cable. You can try better antennas. I use this one.
http://www.amazon.com/gp/product/B0024R4B5C