Are the cremains of different people ever mixed together at a crematorium

Welll, hallelujah! The hamsters are actually doing their job today. Here’s the original post:

bobkitty notes it’s not intentional, which I hadn’t remembered. However, the statement “Granted, it’s likely her ashes are mixed with all sorts of other people’s ashes, but folks don’t typically know that” implies 1) this is common, and 2) there is normally a significant amount of other people’s ashes mixed together.

So what’s the dope?