They took yours before mine!
I submitted five orders, which they list as having been received on April 21. Three orders were processed promptly and returned like yours, but two are stuck on "scheduled for grading."
One of the stuck orders is the one I have been waiting most anxiously for! And it was to have had prompt turnaround based upon coin quality.
Maybe it has to do with using an order coupon.
Or maybe some just have more clout.