>
> WaitEEWriteComplete:
>         btfss   PIR2,EEIF
>         goto    WaitEEWriteComplete

You should add

           bcf      PIR2,EEIF

to clear EEIF. See if that makes a difference - there may
be something in your program that's reacting to EEIF being
set outside of the EEPROM routine. The rest of the code
looks alright

>         return

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