(Don't worry--I'm in a much more difficult predicament! 1st time with chickens, got the "Special Assortment" from McMurray and have been spending much of the last week cross-referencing with my catalog and this website!! It's fun and exciting, though!)
That latest gray one looks a lot like my Lavender Orpington chicks...not saying it's that, but maybe along those lines? Again, please don't take my advice as a complete novice! :)
Sarah
This is my first time with chicks, but my Welsummers look very much like your chipmunk ones. My Ameracuana and Easter Eggers also look chipmunk-y too ;)