Congratulations. My Gracie had an issue with pooing on the pad when she was a youngster. She really does not want to step on the pee so that means that when she goes pee first (which is 90%of the time) she has to tiptoe around the wet area. Many times she would end up going over the edge.
Fortunately we have enough space to use two separate potties. We use the frames that lock down over the potty pads to hold them in place. We have two frames side by side so she has enough foot room to do her pee then do a couple circles and do her poo away from the wet area.
We have had this set up since she was a youngster so she may not even need it like that anymore. I'm not going to play around with it now. No sense in messing with something that is working.