It is not that hard, it is just that a large batch of fakes keep coming around.
As for lot numbers, some of the fakes copied some of the more recent real batches. It's like they buy legit ones and then knock them off.
You need to get yours directly from Europe or have a source you can trust 100%.
This is why most people are going with TTokkyo Nandrolona 300 vials. Also, even if you buy thru a remailer, you are still paying like $3 to $4 per 100 mg.....cheaper if you pick it up yourself in MX.
Good luck