Any help would be great,
All issues are related to the System/SyncTools.GPServer
Failed in acquiring Archive Difference Cursor for dataset: wmhb_gis.DBO.DispCampInventory_DP for Replica: DBO.Ags_Fs_1448316015807 [GUID: 5EC4984C-6AE5-47F3-BD31-E6AC8E5BB407]. Time taken: 0.049000 seconds. Underlying DBMS error [WMHB_GIS.DBO.DISPCAMPINVENTORY_DP][STATE_ID = 2727]. Dataset: wmhb_gis.DBO.DispCampInventory_DP. Replica: DBO.Ags_Fs_1448316015807.
You might look into the available memory on your database server - we've found that when using archiving the server needs a ton of RAM to sync. This is especially true if you are doing photo attachments.
One thing to check out is the 10.3.1 sync patch:
There is an item addressed in this patch that returns the same error message you list above.