"Item sells for additional Magmatic Ore" voids the original Recipe

bug report reference number:
758.043.440

I have a problem while sellin a six-socketed Sword with "Item sell for an additional Magmatic Ore" on it (as shown below).
In my understanding the sword should sell for 7 Jeweller Orbs and 1 Magmatic Ore. I am getting 8 Alteration Shards and one Magmatic Ore instead.

Please enlighten me, if i am wrong, but this is a bug that should be fixed.