Lately, I'm having some problems in Myetherwallet.
- Sending a token always fails.
- Losing tokens.
- Token retrieval with no fee.
What happened with Myetherwallet? is MEW no longer secure?
if Myetherwallet implementing 2FA might be safer.
To simplify what others have said, you might be having problems because you are not spending enough "gas (gwei)" to make sure your transactions reach their destination. When you don't have enough gas, your tokens get stuck on the network and you will have to wait a certain amount of time before they return to you.
What you can do now is to simply wait for your tokens to return then resend them with a higher gas amount (preferably based on ethgasstation.info).