Add Multiple Pieces Problem

I have successfully used the Add Multiple Pieces option to build a palette from images many times. This includes adding a layer for pieces that can “flip” by having the image filenames match.

Suddenly, in the last month or so, whenever I use this option, the pieces with layers show in the palette with the layer activated, even though “Always Activated” is not checked. The Layer property for all the pieces has CTRL TAB set for the key to Decrease Level, but I did NOT set that. I have to remove CTRL TAB from the Decrease Level Key for every piece, one at a time, and then they show in the palette correctly (with the layer not activated).

Is this some kind of known problem, or am I perhaps doing something wrong?