32-Floating Error?

I just did a sample recording using the analog input of a Mac Mini. I’m in Audacity 3.4.2.

This is the recording setup.

Screen Shot 2024-07-10 at 2.21.48 PM

And these are the three recordings I made, one after the other. Record, Stop, Record, Stop, Record, Stop.

Why aren’t they in 32-Float? I’ve never changed any recording settings.