Tile Maps from other Levels Displaying

Hi Everybody. I started building out level 2 of my game. Opened Level 1 to check something out. Level 1 looks fine in the editor, but when I play it, the Tile Maps from level 2 also show up. Why is this happening?

Note: This isn’t happening with Level 2 and 3 or the Menu Level. Just Level 1.

Here are a couple screenshots of the World Outliner. I’ve filtered it with the word stage to simplify it.

First, here is the World Outliner in normal editor mode:

89951-in-editor.png

And now here it is in Gameplay… Notice tile maps from Level 2 are now loading in. Why is that?.. and how do I prevent this?

89952-during-gameplay.png