That was fun. I think I'm just being dense, but can you explain the 13A and 19A mention? I'm just confused since these didn't quite line up with the squares with circles. Also, I think there's a typo for "treasure" in the PLANET clue.
Good catch, I added an extra square to the grid while doing the fill that threw off the original numbering. They should refer to 12A and 18A, and the clue has been edited to reflect that.
Thanks for playing (and proofreading)!