Assets resize when dropped from library

Hi, Love the site.  The more I learn the more I love it.  I bought some map tiles to improve my experience but I'm having fits when I try to build maps because the tiles resize to 3x3 when I drop them.  That variously makes them show up bigger or smaller than they're supposed to be.  The assets are all from Brass Badger so I know they're made to correct dimensions (Badger helpfully provides sizes on some tiles.)  For some stuff that's no biggie but when I need to make the tile edges line up it's terrible.  Various modifers buttons don't help much.  Alt-drag seems to drop things at their preview resolution, which is still wrong. Thanks!

Have you tested it with the grid disabled or tried dropping the tiles on the map layer?

Both, no love either way.  Was already on the map layer.  Grid or no Grid I get a 3x3.

what tile is it?

All of them, but specifically for example Tar Roof 15 from the Brass Badger Metro-Matic City Buildings pack. (1200ishx1400ish so BIG)  I can repro the problem with edge and chrome, on windows 8 and 10 machines here in the house, grid and no grid, tried from the sidebar and tried from the popup deally that you get when you click on a group.  Whatever's going on is something "helpful" in the code, my money is on collision between the grid routine logic and the drag and drop logic.   (A QA engineer walks into a bar, he order a beer, he order 12049714 beers, he orders a zebra, he orders balhag9!, etc)