I have a Resilient Bracelet that I wanted to imbue with something other than +15 Resist Spells skill. Checking menu, I saw that Chiv was same group and following SOP I reduced Resist to 1% so I would have better chance of adding Chiv. I heard the noise that means ! successful ! Imbue, the tried to replace with +15 Chiv. Due to the weight of the other mods, +9 was the max I could attempt. After 3-4 tries - success sound again ... ... but when I looked at finished product, it had both +9 Chiv and +15 Resist - 2 properties from same group - along with the other 4 mods making 6 mods total!