The immediately prior sub start was logged as
[7/19/2016 11:06:39 PM] [DEBUG] [Sequence Thread] TEMP - Current Event2: 0
[7/19/2016 11:06:39 PM] [DEBUG] [Sequence Thread] Checking if Meridian Flip is needed
[7/19/2016 11:06:39 PM] [DEBUG] [Sequence Thread] Telescope is on the West side of the mount
[7/19/2016 11:06:39 PM] [DEBUG] [Sequence Thread] Meridian Flip needed, Hour Angle >= Degrees Past To Flip: 59.916375 >= 0
[7/19/2016 11:06:39 PM] [DEBUG] [Sequence Thread] Running blocking meridian flip...
[7/19/2016 11:06:39 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Starting Meridian Flip Procedure
[7/19/2016 11:06:39 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Skipping Solve and Sync
[7/19/2016 11:06:39 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Stopping the Auto Guider
[7/19/2016 11:06:39 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Sending Telescope command to execute meridian flip
[7/19/2016 11:06:39 PM] [DEBUG] [Telescope Thread] ASCOM Telescope: Pier side is West
[7/19/2016 11:06:39 PM] [DEBUG] [Telescope Thread] ASCOM Telescope: attempting pier flip using sideOfPier
[7/19/2016 11:06:40 PM] [DEBUG] [Telescope Thread] Setting Pier East
[7/19/2016 11:06:40 PM] [DEBUG] [Telescope Thread] Pier Flip failed when using side of pier: System.Exception: Flip requested but cannot be done at present position.
[7/19/2016 11:07:12 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Telescope command to meridian flip has completed
[7/19/2016 11:07:12 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Telescope failed to perform meridian flip
[7/19/2016 11:07:17 PM] [DEBUG] [Main Thread] PopulateDataModel: Transferring view to the data model...
[7/19/2016 11:07:17 PM] [DEBUG] [MF Update Thread] Performing serialize...
[7/19/2016 11:07:51 PM] [DEBUG] [Pier Flip Thread] Meridian Flip: Procedure complete
[7/19/2016 11:08:52 PM] [DEBUG] [Sequence Thread] Blocking Pier Flip: Failed to meridian flip, aborting sequence (True)
[7/19/2016 11:08:52 PM] [DEBUG] [Sequence Thread] Adding sequence level notification: Failed to meridian flip, aborting sequence.
Note its has HA -39.255375
So, somehow between those two sub, 10 minutes apart, the HA changed from -39.xx to +59.xx