Cannot Traverse Tower - Map Glitch

I'm not sure if this is reproducible with mouse and keyboard, but I was using controller on PC.

I came across a Mesa Tower and inserted a map. I decided I didn't want to use that map, so instead of taking it out, I clicked Square to Place in device. This resulted in the map going into the tower, but it did not swap for the map that was already in there. That map just flat out disappeared. Confused, I tried it again, and sure enough, the map that was already inserted disappeared again.

So after doing this a few times, I took out the map that was in there and put in the map that I actually wanted to use. Well, now the 'Traverse' button is greyed out. I cannot use any maps. It's like there are several maps inserted-- like the maps that 'disappeared' became part of a hidden array in the background that is not visible to the player, but since the number of items n in the array is > 1, the Traverse button is disabled and cannot be used.

Now I have a tower next to two citadels that I cannot use at all. Sucks...

Update:
I was correct in my assumption. So I found out now that after trying to go to do another node instead, that my missing 3 maps were sitting in there for me to remove. So I guess this doesn't leave things in a glitched state, but is definitely a bug.