Question

Typing to set B (any octave) as the root note in Sample One XT rounds down to A#. This is a silly and admittedly annoying bug.

Answer 1

Oh! You reminded me to report that Presence XT Editor does something similar as well for some note names, I think "B" is one of them.

The place to fill out bug reports is on "Presonus Knowledge Base" by the way, with a Support Ticket. For the most part that's the one place they'll log issues from.