one of the 2ml vials is like all the ones i've seen on the sites. the other is shorter and fatter with the expiration date labelled different. the ones on the sites are "exp. date: 2001-03". the fatter ones are"exp. date: 011028" i have the box for the fatter ones and the lot# and exp. date are stamped in the box not printed. other than that the 2 vials look the same. any help much appreciated!