My Merlin IV soda vending machine which is equipped with a BA30B bill validator, and change machine of unknown model (Will update tomorrow if I go to mess with the machine more) is giving incorrect change when given two $1 bills. The coin mechanism has been set to vend at $1.25, however when given two $1 bills the coin mechanism consistently dispenses $0.25. The machine works fine when exact change is given in quarters.