I tried a manual slew then center to my target last night using the offset mode, TSX and a Paramount. The slew worked but the centering slew failed on the correction - on the first attempt (19.54). I then hit center again and it worked on the second attempt. This may be related to my other thread where I had a slew crash when the centering was automatic. In both cases the sync type showed offset but before hitting the sync a second time around, I opened the sync dropdown and selected offset again. Could it be that SGP is picking up the wrong sync type on power up? That is what the log file suggests.
https://www.dropbox.com/s/ol2jm2z2fa05xcu/sg_logfile_20161010193950.txt?dl=0
update: I'm doing an intensive test with a mosaic, short single exposures of each tile and see what happens.