Why does my "cube" not unwrap into a T Originally, I had my layout like this in Blender:

The gaps are placed there by hand so that bleeding in photoshop wasn't so hard to sort out.
I then made some changes and wanted to get back to the T shape, but when i do the following cuts:

I get this:

Any ideas what I'm doing wrong?
You've ripped an edge, select all in Edit mode, AltM to merge by distance, then unwrap again.