The and/or construction for checking spells you have is losing the restriction on unit == "player"
Change
if unit == "player" and
to

if unit == "player" then
  if
  -- checks for spells
  then
    -- add event
  end
end

Ok thank you for the information. I will make that change in my next update! I will release it today I have been trying to fix that for a long time. I really love it that you sent this issue.