Look, now that i'm alot less drunk than I was last night...
You'll be fine with red loctite - just use it sparingly ok (you wont need heat to undo them if you use it sparingly).
Slyder has some very well thought out ideas that you could look at as far as what is going on with your bindings. Only run a thread tap into your inserts if you know what you are doing though.
Im thinking its happened to your lead foot only due:
more flex being put on it during your riding/turning,
its the first binding that gets all the bumps and shit when your riding.
Never Summer SL153 & Atomic Hatchet 159