Difference Between 'group [x] sneek enter' and 'group [x] home'?

Sneak Enter means go back to the background value, which is the values the channel would have, had you not played around with it. 

So the question is what were those channels doing before you pan/tilted them to what would become their new home position.

It turns out that there was someting wrong with the Fixture that was in the Show File.  I needed to unpatch the fixture, then patch the same fixture into a new address from teh Fixture library (at whcih time it worked as expected) and then move to the origial address.  All working as expected now.  The re-loaded ficture now returns to the home position as saved in Preset 999 when I 'Go_to_cue 0' and 'clear, sneek, enter'.  Thanks Craig