Great update! and just in time, as I am leaving for Sun 'n Fun.
I am sitting in my office updating the sectionals and terminal charts, adding instruments, trying out "stuff". I have two markers that I cannot get rid of. Tried hitting options, but I don't get them (that works on new markers I create). Tried moving the map out of the area, but they follow it. Found an option to remove all markers - had no effect but the markers are still there.
Finally turned unit off, rebooted, and they are gone.