In SMART Notebook 23.2, the algorithm for undo when inking seems to be counter-intuitive. Sometimes, it just undoes the most recently inked thing, which is what I would expect. Other times, it undoes the last 2 minutes worth of writing. Oddly, if I erase some ink and then click undo, it does NOT undo the erasure, but rather undoes the ink that was written earlier and leaves the partially erased ink there. Can your developers please debug/refine the undo algorithm in SMART Notebook?