my daughter got 3 bottom teeth right in the front, and she has one on top but it's not the front! it looks like it's 2 over from the middle. there's one coming through on the other side in the same position. i've never had a baby sprout teeth in this order and i don't know of any irl who got them so far back before the front ones. i've read about it online though. my other three got two bottom then two top, all in front/middle. she is 7 mths.
My oldest niece got her two bottom teeth in first, then sprouted her two top "vampire teeth" before any more came in. One of her little sisters, and my youngest son both had their first teeth (my son's four bottom and my little neice's four top) come in all out of order. Apparently, it's more common then you think, and most the time, their teeth end up looking even once they all come in.