This practice of exaggerating battery specs is unlawful and can be very dangerous to consumers if gone unchecked. The goal of any manufacturer or brand is to sell as many batteries as possible but some companies have been known to exaggerate their ratings to appear to offer a better product than the other.
This is especially true when discussing the Chinese re-wrapping brands. Not all brands are created equal and often times you will find are not very truthful in their battery ratings. The first thing to consider when choosing an 18650 battery for your device or project is the battery brand.