Butcher Makes Invincible Slimes

[Ruok2bu]

I spawned a 10 slimes and when i used /butcher it said it destroyed the mobs, but the slimes werent dead. So i used it a few more times and then the slimes became invisible! When i hit them, they didnt turn red like they were hurt and i lit them on fire with lava and they didnt take any damage or die. They just hopped around while on fire.

[10se1ucgo]

Well its a bug with minecraft, not with Hmod or WorldEdit. Slimes are very buggy in SMP relog and it will be fixed