Submarine glitch

[RPKUPK]

Several times now I've had a full strength submarine sitting in port, say Oslo, fully fueled (level five), then, before I move it, I move one or more submarines out of fuel back to that port. Even though I click the two low fuel submarines away (remove the checks) and leave the check for the fueled submarine, I cannot then move the fully fueled submarine.
When I restarted the turn I was able to move the single fueled submarine out of Oslo, and then move the two low fuel submarines in to Oslo.

[AlvaroSousa]

Due to simplicity of design you need to think about how you move fleets. In your case move the subs in port out 1st, then the returning subs in port.

I already tested the other way to do it and it creates constant unnecessary or every naval group. There are also some gamey aspects players can do with this.