(update to the "Circuit Move and Copy" comment above, related to "off-grid" copies).
I just realized that I was skipping one crucial step which was causing all my moves and copies to be off-grid
When using the "Edit/Circuit Move and Copy" command, after everything is selected that you want to Move or Copy,
when you start the Move or Copy, the items will be attached to your cursor at a calculated midpoint of the selection group
(which is almost always "off-grid" !!!)
SO,
when you set the moved or copied group down, the components and vias won't match any grids you have set in your Editor Control dialog box under the "Grids" tab. I had gotten into the habit of using the Place/Snap-to-Grid command after "Circuit Move and Copy" commands, but it sometimes alters the routingHOWEVER,
if you "right-click" after the selection is made, BEFORE you start the move or copy, you can SET ORIGIN to a via or component pin (or anything that is currently "on-grid"), and THEN execute the Move/Copy command. Then you won't get any errors or warnings about "off-grid" items in the DRC check
I had seen the right-click menu before, but got confused by the SNAP options. SET ORIGIN works!
hope that helps,
Jack