That is a funny bug.
To start with, I was sure that I saw this somewhere before but I could not find it. It seems as if newly spawned rebel armies and fleets are spawned within your command.

Please run validateInstall.bat found in your main RTW folder and post your results here, maybe your build is bugged.

Since I can't give you a solution at present, and if the build is clean, you should best start a new campaign (seeing as it is just 261BC).

XSamatan