You have two choices, either of which may be right in the circumstance: 1. You can talk to them directly, and say "I feel like we're not on the same page when

You have two choices, either of which may be right in the circumstance: 1. You can talk to them directly, and say "I feel like we're not on the same page when we talk about X,Y,Z [what can we do to come to an agreement]/[why do you keep doing that?]" (the bracketed parts depend on who has what authority). 2. You bring it up with your manager.