So am experiencing a weird problem........My macros "break" mid-fight

I will be tooling along, killing indiscriminately, when all of a sudden my macro breaks. It’s funny because if I happen to be using more than on macro on any given toon, the rest work fine, just not my “main” macro. For instance, if I have a single target macro, and an AOE macro, the single target breaks and the aoe works fine still. Or, in the case of my rogue, I have 2 combat st’s and 2 combat aoe’s; the main st I use breaks mid fight but the other 3 work just fine. Sometimes, after the fight I can logout and log back in and this fixes the problem, but sometimes ALL of my main macros will no longer work untill I exit and re-enter game. I noticed this as I have several level 100’s and tend to do quite a few Kaz runs in a row; interestingly enough, when I do notice the macro is broken I am able to continue on in fight with the aoe macro, ect. How can I fix this? It is affecting my dps greatly and I don’t understand what is going on…any help would be welcome!

Paste the one that is freezing up.