Double Doryani's Institue - Only 1 Lapidary Lens use

I built my incursion to include 2 lvl 3 gem rooms for the Lapidary Lenses. When doing the temple, I was able to use the first Lapidary lens to corrupt a gem (and lost quality :-P). When I got to the second room, there was a Lapidary Lens there but no enchant/corrupt available. It appears that the first one used prevented the second from being available even though there were 2 LVL 3 rooms with 2 separate Lenses.

Very frustrating after buying for a 20/20 gem so I didn't have to wait until mine leveled and thus put off more incursions. In the end the second Lens was wasted because it wasn't usable at all...