I am pretty sure that there IS a 2' discrepency between the DWL height on the hull table of offsets and the DWL height on the end form offsets. The end form DWL is 2 inches higher. The thing to remember is that the DWL of the hull offsets is not indicating where the strongback is positioned. See what happens if you leave the stongback on the DWL for the end forms and draw the strongback cutouts 2 inches higher than the DWL on the hull forms. It's a little hard to think about this without seeing the parts in front of you; I might be backwards in how I'm explaining this but if you have the forms in front of you it should start to make a bit of sense.