But your comment that a model for each is best makes sense since the model accounts for scope relatedI don't think this would cause the mount to be off by 90 degrees. Most likely the site location or time zone were different between the computers. That might happen if you loaded the settings *after* APCC on the new computer had already initialized the mount.
Also, the mount position would be incorrect if APCC on the second computer unparked the mount from a different position than where the first computer had parked it. It is best to unpark from last-parked position unless it is a new setup location or you moved the scope to a park position by hand.