Binance is a trading site exchange,and that you mean that you check your erc 20 token portfolio in etherscan i.o or explorer you only doing that in checking in your MEW wallet if im not wrong,why you should not check that your token when you transact  in binance website there is smart contract there you can see your deposit token,or maybe you mistake  when you doing your transaction,and your tokens is blown away,for more information there is a guide,on how to see your deposit coins in binance trading site.