Hi buddy, I meant the dex system allowed it [you can create a token with any name in less than 10 minutes in Ethereum remix, easily, and low cost].
Please enclose the source where you get the information, buddy. 
DEX system didn't said the same name, it only stated any name. You cannot judge that statement agrees with clone tokens or tokens with the same names. You must have more strong proof to claim DEX system allows it.