When you make a transaction using a stablecoin or token for the first time, you'll need to first approve the Spritz smart contract to use the coin or token in your wallet. First click "allow Spritz to pay with your asset" to approve the use of the token.

Once you approve the use of the token you can go ahead and make a payment or off-ramp to your bank account by clicking "pay with this asset" in the transaction window. This won't send two transactions, and only happens when you use that stablecoin or token on Spritz for the first time.