Odd fleet behaviour

[Law&Order]

Lo all,

Just found this forum so be gentle Im sure it has been asked before and dealt with, heres my problem. At some point in the game with say 4 fleets, I send my main attack fleet to cross from my territory into the enemies to destroy etc, and then from there to another part of my empire different from their starting point. However, sometimes I can not force this behaviour on the fleet. They go back to the nearest supply station, no matter what I try. I need them on the other side even though they might end up in yellow or red on supplies! I turned of minister control etc. Very helpfull if your fleet of new and shiny dreadnoughts gets stuck at a particulary uninteresting piece of space. Any help is welcome!