M.H.
Hello,
I had the similar situation with my son. Although this may sound a bit strange but it worked for us.... We had "magic underpants". My son too would go in his pants. I took an old pair of underwear and cut a slit/hole in the butt. When he had to go, he sat on the potty with the "magic underpants" on. When he went, the poop dropped through the hole and into the potty. Eventually we worked our way to just the waistband (cutting away all the material) and finally.... the "magic underpants" "disappeared" all together.:-) Good luck!