Kerbal Space Program

When spawning a new vessel in orbit the mean anomaly field seems not to work as expected. Where craft actually appear seems to be extremely complicated - it seems to be affected by previous run-throughs of the mission. This makes it impossible to control where a craft spawns.

In the attached mission file a new satellite is supposed to appear in geostationary orbit directly above KSC.
If you launch and stage immediately it will spawn in a geostationary orbit above a certain longitude A.
If you restart the mission, warp forward a few hours and then stage it will spawn at a different longitude B.
If you restart the mission again and stage immediately it will now spawn at longitude B again.