Buggy 25.5 - keyframes created by PPro in timeline?

Had a problem with graphics in the timeline yesterday: Was having two different rectangles move - spin and move from one place to another, and needed to create a bit more space for one version to fit a bigger sub-head title. Copied the perfectly good set of five elements (background color, logo, text and two rectangles) one from one sequence to another, went to the endpoint and subtracted 200 pixels from the vertical on those two rectangles. Should be easy peasy, right? Not so much. In between the starting position and the end position, with no visible keyframes, the rectangles moved in ways not desired nor shown in the timeline. clicked and dragged both start and end point keyframes and deleted. Added fresh and got same problem. Chatted Adobe and was told to delete the whole thing and start over, which is easy enough in this case, but jeez, isn't that what we're not supposed to have to do? There have been other issues, too, like just rendering out four videos and being told two of them have files offline and that proxies will be used but I never made proxies for any of these files when importing. MacBook Pro, Sequoia 15.6.1, 48GB Ram.