I see this all over and it always goes without comment, so I'm curious; is "and" used instead of "an" in a dialect I'm unaware of? Kinda like how "anymore" has a slightly different usage (I think in the southern us)
Yes, in my neck of the woods it's always used in a negative statement (we don't go there anymore, can't anymore, etc) but some places use it in positive statements kinda like "nowadays" (we go there anymore). Trips me up a bit whenever I encounter it.
I'm not sure about "anymore"—other than moving it to the start of the sentence—but I have noticed that "whenever" seems to have become fully interchangeable with "when" for some southerners.