I don’t remember anyone else commenting on this (although I’ve been known to forget something now and then, so I could be wrong), so I thought I would.
If you order the passthrough sized plywood and cut it down to 20x12" sheets, the grain will run the opposite way from normal. For some designs, depending on how you like your grain to run, this can actually be a good thing; for others, not so much.
Also, one sheet will be an inch or so short on the 12" measurement.
I’ll actually go one step further and say that it’s plywood with mdf core so “grain” is entirely up to the veneer layers and there is no guarantee that the top and bottom surface grains are even going the same way. Probably yes but not necessarily.