Clay,
I too have been seeing these mirror numbers, and God has been separating them but in a different way. It's as if He's "folding" the number in half. For instance the number 5775, if written on a piece of paper would be "folded" between the two 7's. The crease produced by the fold separates the two numbers into 57 and 75. I believe mirror numbers are both the same number, but read in different directions. English is read from left to right and Hebrew is read from right to left. Mirror numbers are a specific number meant for both the Jew and the Gentile. In this case the specific number is 57. What "57" means, I haven't a clue. But this is what God has shown me about these numbers. Just thought I'd share.
 In Christ,
     Vicki