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

Sorry, probably newbie question... 

I set my movers to a particular Pan and Tilt setting. 

I then run 'Group [x] Pan Tilt Update Preset 999' (where 999 in the 'Home Preset' value in Setup)

If I run 'Group [x] Home' they return to the value I set in teh Preset in the Update command, as expected.

Then I run 'clear sneek' and the values go off into some other value... (unexpected)

Why is there a difference between 'group [x] sneek enter' and 'group [x] home'?

I expected these to end up at the same Pan/Tilt outcomes?

What am I doing wrong?