well.. as you know, each human day is a tama-year. but that doesnt mean that once the tama wakes up, its grown a year.
tamas grow at the time they were "born."
for example, when i got my tama and set the time, etc. , it was 2:05pm. so now, everyday around 2:05pm.. my tama grows a year.
hope this helps !!
PM me sometime and let me know if your tama grows like it should. =]]
--Nx3