The stage map issue was cause by the set-up of scan mode.
I might not put the scan mode to SPOT when I was setting up the PI program, so the PI memorized the column condition during the map set-up, even I changed to spot mode before the mapping started, the PI used the B_UP mode when the mapping started.
When I used the SPOT mode during map set-up, stage map works fine.
I will try to not check that "Use current instrument setting" box and see.
Minghua