i jumped through the gate and was in Tau-23 but a local molly in Leeds had told me via PM's that i was at the Leeds jumpgate and well...i tried docking (i couldent be killed then via my clone) and relogging but it was still there
so i logged on as my BC to try and kill my clone to get it out of the way (his fighter's guns couldent do much except a bit of anti-shield) but soon as i got there i couldent see anything and it was only that person who could see and shoot my clone. he re-logged on and it was gone:)
best solution: if you see a clone, re-log as soon as you can
This happens in nearly every mod I have played.
I can't remember Vanilla FL too well so I can't say anything about that but I have played all the other larger (and not so large) mods out there and there have been occurances such as this.
Basically, it seems to be a bug which cannot be fixed, a game bug, not a mod bug probably.