1. List Object:
I'm not sure if i did it correctly but i don't get any issue. I've set the width in properties to 200 instead of 128 (default value), then double clicked the object in frame editor and set it to a bigger width by dragging an edge. The final size width is the one i've set by dragging.
If I resize from 200 (typed in) to 250 (via handle) and click on the width property again, 250 is replaced by 200 again.