I have bought this ampules of sustanon 250 from karachi pakistan. It seems strange that some of them are not the same size as others. Is this normal for legit gear? Also as you can see the lot number and exp date on some ampules can be rubbed off,not so easy but evetually the numbers come of if i insist with my nail. It is normal that the numbers are stamped in difrent spots ? Can be such a diference between them from lot to lot? Thanks for the answers.