I wonder if you could watch the very short video to see how the Rectangle command doesn’t seem to be following the dimensions specified and the rectangle drawn is of a different size? This is something I run in to over and over again and have noticed it for several months now. It was there in Rhino 6 and is still there in Rhino 7.
It’s very blurry, but it kinda looks like you are not hitting enter between entering the 2 dimensions for the rectangle. To draw a rectangle with specific sizes, start the command, click a point for a corner, then type in 1 dimension, hit enter, type in the other dimension, and hit enter again.