Duplicate Affixs

On items that are found, i’ve noticed that there are duplicates of the same affix. This has only occurred when the affix was normal and also epic. I have not encountered this in the Enchant area, so I am assuming that all affixs are applied to magic items simultaneously, and the check for duplicates only applies to affixs of the same level (normal affix does not duplicate nomral, and epic does not duplicate epic, but there is nothing for a check on epic vs normal affix). Not sure if this is intentional, but I thought I would bring it to your attention.