Not sure.. but it might be because your only suppose to have 1 of those items on at a time.. maybe the "keep time" or "reset time" lasts longer for that one effect (the stored points) and it's giving you those problems??
Not too sure really, best thing i could suggest is looking through your skill.SData, or skill table in database and see if you find anything wrong there...
Or pray that someone that knows what they're talking about see's this post and helps