We had that problem when we first brought her in, but eventually we taught her to use the other computer chair that I brought down from upstairs. However, in recent months Pepper took over that chair, so I think that's one reason Mel is trying to reclaim ours. The thing is, though, she still does this even when Pepper is not using the other chair.
For some reason, Mel likes to get up alongside the downstairs closet and meow. Sometimes she stands up and paws at it repeatedly. I have no idea why. She doesn't do this at any other closets in the house. I've opened it several times to make sure there's nothing in there that she would want (like if a mouse got in there somehow) and I don't see anything special.







