I too have a theory. What if this drum has had the lugs turn the wrong direction (put back on in the wrong up/down config)? The mounting holes appear to be exactly even all the way for the lug mounts. If you tuned them the other way, all the way around, would that then bring the gate into alignment? It seems to my eye that is the simplest explanation, but then again, I only know my around around a very few drums. Try flipping a couple just enough to hold the hoop to see if that realigns the gate to correct position.
Looks like it is re-wrapped to me, and I don't want to seem like a smarty pants, but am I the only one to catch the mis-matched lug here? There is one lug that looks like one of my MIJ lugs on there. And this is what I think. When the builder put it back together, the lugs are reversed, making it look as thought the strainer is in the wrong place. Reversing all of the lugs would definitly realign the gate to right position.