Using SYNC show on an AdvMessageDlg it renders initially in upper left of page and then jumps to it's centered position... is there any way to have it just appear in the center?  Doesn't seem to be a problem ASYNC but I can't use that for a few different reasons.

Still on version TMS IW with IW 12.2.4  but I remember it used to do this with older IW versions too...

Unfortunately this behavior is by design because changing it would cause issues in other parts of the functionality of the IWAdvMessageDialog.
It's on our to-do list to improve this behavior in a future version of the control.