Digital BW, The Print

Purple spots on the film indicate areas that did not get fixed properly.
The odds are, from what you described, that when the film came off the reel
it was no longer separated from other parts of the roll, and thus one part
of the emulsion stuck to the base of another part of the film.  It's likely
that those areas would be neither developed nor fixed, but since the fixer
clears away the parts of the emulsion that haven't been developed or
exposed, anything that remains (and that will look like unprocessed film)
has to be an area that didn't get fixed.

If you haven't already, practice loading the reel with an expendable roll of
film.  Do it with your eyes open at first, so that you can see how it has to
go, and then with your eyes closed until you're really comfortable with it.
THEN go back to the darkroom!