It seems to me that the upgrade "Mahogany With Maple" goes more appropriately with the upgrade that has the wooden background in the center.
Right now, the upgrade with that title has a Mahogany box, but the usual glassy center.
Here are the two I think that have been switched:
http://www.glitch.com/furniture/sdb/mahogany-with-maple-storage-display-box/
http://www.glitch.com/furniture/sdb/mahogany-storage-display-box/
Edit: and it looks like this has been fixed.