The SyncWithCurrencyManager property keeps the grid's ActiveRow in synch with the currency manager's position. However, when a row is deleted, it does not automatically synch up at that point. So when you delete a row in the grid, there is no ActiveRow. Setting SyncWithCurrencyManagerAfterRowDeletion to true when SynchWithCurrrencyManager is true will autosynchronize the grid's ActiveRow after a row is deleted.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2