You know the surface of the table (typically) slides away from the wall to let the leaf come up, right? Look underneath for a sliding latch that locks it in position.
If that's not the issue, then it's still an easy fix. The freestanding tables are screwed into the floor with 4 loooong wood screws on the legs. Just unscrew and adjust the position of the table relative to the wall.
I'm not totally familiar with your BH layout so make sure there won't be issues with the *other* side of the table hitting anything when you close the slide.