It’s not a glitch – NTSC is a 30 frame counting system, so 24 frame native essence will still have as though it’s counting in a 30 frame world, thus the dropping of frames. But all that is keyed off the cadence relationship A, B, C, and D (and a hidden X). If you want to see 24 straight up, then duplicate the START into the TC24 and that will count as :00 to :23.
In an HD project, 24fps is a SMPTE standard, and will count as such in the START column. The START column always counts as the project type.
Michael