Probably Animanics, though I was grown up before I watched that. Before that, I suppose Beavis and Butthead and even Simpsons were considered edgy.

Yes. The periods are just part of the name like any other letter, so 5 is compared to m, and numbers sort before letters. You can add something like ‘.0’ to make it sort more naturally. Look up an ASCII table to get a feeling for how strings are sorted.