First off, Welcome to SubSim!
I think you're going to have to turn off the auto crew. I've been playing Dangerous Waters for way too long to remember how exactly but I'm pretty sure it's in the options menu.
If I recall correctly, you either use the auto crew or you don't. You cannot override their solutions if you are using them. That's why your solution isn't entering. The bad side of not using them is that you become the tracking party for every contact. Once auto crew is off though, you can tell it whatever you like (right or wrong).
Fair winds and following seas!