Conform to convention? Ha!
Both were PiA. I removed the one off the slate slab and mismanaged the olla (along with a good chunk of my collection).
Edit for FYI: the olla pic was side-ways until I pulled down the attachment and clicked on Manage Attachment and clicked on the pic in question. The slate one is probably also side-ways but doesn't really matter.
On the previous edit: I don't know how I did that after all, couldn't repeat it.