Same here. I do a lot of bumping East and West and I mean A LOT. I have yet to have an out of sync issue from the ASC1.
Are you doing it through the remote, or by physically pressing the East West buttons on the actual box?
My East/West jumps are programmed on my JP1 remote with the STB. So, i nudge all the time too with the remote buttons. However, if i am trying to get a lot of satellites back in sync, i find it much faster to sit on the floor in front of the device, and press the buttons and save on the front panel box.