Take care Donelson, we are all here pulling for you!
I had a similar scare, I went thru 24 hours of the worse hershey squirts 2 days after my surgery and the initial thoughts were the same, somehow the bowel possibly got sewn to the urethra and I was urinating thru the bowel even though testing was performed for a leak during surgery between the two organs or possibly a CDIFF infection.
After doing a cystogram looking for leakage and testing for CDIFF no leakage was found between bowel and urethra, the connection between bladder and urethra was perfect and the results of the CDIFF test was negative. The results were so good the URO took my catheter out only 5 days after surgery instead of the scheduled 9 days. The reasoning for the diarrhea was due to an antibiotic I never took before. Over the next few days I was back to normal bowel movements and kept up the fluids and juices to keep things flowing. A year after my RALP I went thru a colonoscopy and things checked out good again with the plumbing, some polyps were found (benign), but it was recommended I need to get another colonoscopy in 3 years to make sure no other polyps return and if so stay (benign). But I get to drink the Golytely prep again that we all like so well .
Sounds like your doctors are on the right track and you are in the best place.
Hang in there, keep us posted.