Can't move the bar connecting 2 eighth notes

I have 2 consecutive eighth notes in my score and the stems were too long. So I shortened the stems (double clicking so the little boxes appeared at either end and pulled the top down to a lower length). But the bar connecting the stems stayed up where it was, well above where the stems ended. I clicked on the bar to highlight just it. To the right, in the inspector, options for vertical and horizontal offset appear but when I change them, it does not move the bar at all. I have tried changing them, clicking away, pressing enter, undoing, closing and reopening musescore. The bar is the only thing highlighted blue, but the offset function doesn't seem to be working on it the way it works on everything else.