I was running bounties at around level 29 and got a vision. When I got to the 5th or 6th floor, the blue portal took me back to the floor I had just cleared. Finished the bounty and had to leave the game to close the vision. Not that big a deal since I needed to leave the game to up the T level. However, I’ve never seen a vision double back before.
I’ve had a similar situation. But it happened because the blue portsl spawned directly over the red portal. However, when mousing over and trying to click the blue it was registering the click as being on the red.
I had to carefully mouse around the edges of the portal sprite until it was showing the next floor (the actual blue portal). Then I clicked and it took me to the next floor.
The portals were not close together. Effectively, the floor had two red portals, but one was blue. I’ve had the portals on top of each other many times. I’ve never had them so close together I could not read the names of both floors.