it seems that it is being recorded to the track
Are you sure? Have you solo'd the track?
I'm guessing here, but are you using the Inspire in direct monitoring mode? If you are, it's possible that your click is routed out via Logic - did you try my suggestion above? Turn off both metronome options and play your existing track back - no recording. Then turn on the Click on recording option and see if that works.
I'm so utterly lost.
Don't get discouraged - you're just a click
away from solving it. Just be methodical in tracking it down. You could play back a track without your interface on - Logic will default to built-in audio and you can rule out a routing issue.