I think that she has some liquidy poopie up in her bowels and a bit of a blockage of constipation. The liquid comes out around the constipation. She hasn't been able to get all of it out (a nice big poopie - you know how great that can be LOL!) so it's coming out in stages, but not the part that's causing the problem.
If I were you, I would give her Miralax, or if she will eat it, prunes. Put a diaper back on her and let it work all that stuff out. It will be messy, but worth it.
Meanwhile, she needs to be kept regular. She needs lots of fiber and a daily dose of prunes.
If this doesn't work, talk to her ped.
Good luck!
Dawn