From recollection I think that they rearranged the set at some point, so that also confuses the situation. Also, if you ever get the chance to watch The Flash as done by Bilson and De Meo (it's the spouse's fault, truly! Although RB's episode is a hoot) they clearly reused their sets later in TS, and Barry Allen's apartment, although quite different, has disconcertingly loft-like bits.