Larry,
If you have the exclusive mode set appropriately, all should be well. As you can see from my set-up, I have 48 kHz as the default.
Because of activating the "allow applications to take exclusive control", though, when I start BIAB it will set the system to 44.1 kHz.
There's a bit of a learning curve associated with all this stuff. Hang in there

By the way, I was very impressed that you used tags and repeats in your waltz! I rarely use those because I prefer to lay my song out in linear from as one single chorus from start to end.
All the best,
Noel