I just started my v4.5 yesterday and maybe it's just that I'm a total n00b, since my last tama was a gen 2, but i assumed that once you started evolving one way, you could only progress from that evolution, however, my tama (a girl, btw) started off as a Tsubutchi (as they all do, I know, I'm captain obvious), then became a Kuchitamatchi. Then today it evolved into an Ura Young Memetchi.
I would have expected it to at least end up as something with a beak/enlarged lips..
or am I just too caught up in the whole evolution tree idea? Or I could just be crazy. You never know.