LuLu is doing the SAME thing
I figured out her schedule for when she poops...the only problem is, the second time is in the middle of the night in her crate. She will wake me with a little whine to pee, but not to poop. We've tried putting her in her xpen at night, but she cries ALL night. She doesn't cry in her crate.
If we don't watch her every second, she leaves us a prize somewhere in our kitchen. She's young, so we keep praising and giving treats when she does go on her pad. Hoping she'll eventually get it!!
It seems like several of us are having the same problem. Good luck
