So, I just got a rather irritating rejection notice today. I submitted an STL containing two identical earrings within. Today I get emails saying that the STL has been rejected with the stated reason "Multiple parts in a single STL : 2 in 1". Now, I've read the guidelines for silver design, and I've checked the STL and sure enough, 2 shells. What's most bothersome is that I've printed something virtually identical with a similar configuration before just fine without having to split up the STL. I don't know why one would be accepted and one rejected. Any idea what went wrong?