This is really weird. I just turned on the ability to use/edit signatures in my store. Then I purchased the ability to use/edit signature. As soon as I purchased it, my rep power was displayed as 0 in postbit even though it should have been 107. It still gave 107 rep points when i repped someone, but it displayed as 0 in my postbit.
I turned off the use/edit sig feature in my store...still displayed as 0 in postbit.
Finally, I turned the use/edit sig back on, went into the store, and removed my purchase. Only then did my rep power return to being displayed as 107 in my postbit. Needless to say, I have disabled that option for now.
Does that make any sense?