Ignore what you see in the Properties panel in Windows - it disregards the actual timing. If you see the cursor running at the right speed in the Test area, it will work correctly.
Spinner speed won't change.
I posted a new set of cursors (Golden Arrow) yesterday, and the first comment was spot-on: the spinners seem a little slow.
I've tried selecting all frames and typing a new number (they were set to 2 originally) in the Frame Properties panel, and I've tried the slider window, and the speed changes noticeably in the two left hand panels (Preview and Test Area), but when I save or save as, and check the (Properties of) the cursor files in Windows Explorer, the cursors run at the old speed still. When I re-open the program and re-open the cursor I tried to speed up, the left panels show a faster spin, but the times under the frames are just exactly what they were originally (2).
What am I missing here?