Automattic sub-D on export?

ezrhk

I can't for the life of me seem to export with the bridge without it subdividing automatically. When the "Bake subdivision" box is unticked, I expect the base levels to be exported (that's how it previously worked anyway). Even when ticking the box and choosing either 0 or 1, still subdivides multiple times anyway? Would you be able to tell me what setting might be enforcing this?
On the left is the simple base level but I'm always getting what is on the right, no matter if I choose no divisions or 1 or 2.

It's hard to test because it takes about 10 min to export and import because of this, and it didn't used to do this before as it actually exported the level I set it as.