Mirror of Kalandra Bug - Item Copying Bugged (stats changed + losing stats)

Hello Everyone,

My friend and I attempted to mirror a BiS, and after it was done, he traded to me the mirrored version, it was lacking the skeleton minion stats. The item level also changed from lvl78 to lvl64.

At the time, I was lvl 75 and the rattling sceptre was lvl 78 after copy, when trading, it didn't show the warrior minion skill after trading. Once I teleported out to my own hide out, the item became lvl 64 as shown in the screenshot.

TL;DR: Mirrored Item, after trading skill missing, after changing location, item level changed (from lvl78 requirements to lvl64 requirement)

here are the screenshots of the items:

Original Item that was to be copied: https://ibb.co/42Tnw5j
Item after it was traded: https://ibb.co/wCYXfqK
Item after teleporting out of hideout: https://ibb.co/gTCtbZL