Child->Toddler Conversion Issue (Arms through Body)

Hello! I have been trying to convert some of the Parenthood child outfits for toddlers, however for one of them whenever the toddler crosses their arms they go through their body (this seem to be the only animation issue I saw, even after I put it in live mode). This hasn't happened with the other conversion I did so I was wondering if anyone could help me figure out why.
V.S.

Package File: drive.google.com/open?id=0B_07ogYjNyo6Yk5obFVhSF9VYU0