I purchased two Gucci bags from an online store, one for me and one for my mother. The bags are identical. I'm curious to know about the serial numbers though. The bags have 2 rows of 6 numbers. The first row is the specific bag model. So, the second row is the serial number? Both bags have the same serial number. Is this because the bags are the same model? Each bag within a specific model does not have its own serial number, its the same for all of them? Help! I'm confused and wondering if the bags are authentic now!!!