The way it currently works, when you move folders within Lightroom then the folders will automatically collapse when they are done moving. It seems random, like it is a bug or something, and is really annoying. It would be better if the folders just stayed open after the move was completed.
I agree, though it would be far less objectionable if we could move multiple folders. As it is we need to keep going back and forth, and so collapsing is annoying. If we only had to do one move, we'd probably never notice.
Same problem happens on the other side of library view, with key words. When you are moving around key words embedded in other key words, the 'folder structure' collapses when it's neither necessary nor useful.