Yeah I can confirm that. It also matches my latest (in a long line) theory about what is happening. Put in any sequence of chords and select them all. The root key shown in the info line is always the root of the first chord in the sequence, lets call that X. You should be able to transpose the entire sequence to any root key that is below X in the drop-down list. So if X is F then you can transpose to F#, G, G#…B. You can also transpose to root keys above X in the list, but there is a limitation when doing that. You can only go up in the list until any chord in the sequence gets to C. Once that happens you can’t go any higher. So, for example, if you have 2 chords F and D, and select them both the root key (F) can be changed to E and D# but no further. That’s because when the root gets to D# the second chord (initially D) is now C. So it seems that the algorithm is broken in that it doesn’t allow any chord to pass beyond the C boundary going up in the list.
Kind of hard to describe, so I hope that made sense. Can anyone confirm?