In new kingdom after PK

Hi

I was killed in war a few hours ago and having reentered my province details after the "You died" message I appear to be in a new kingdom. There have been no intra kd hits or the like. The obvious answer is that I set up a new province rather than rejoin my old kingdom but I'd swear on the bible I didn't screw something as simple as that up.
Can someone tell me what went wrong?

Support ID - FD8539DC

You clicked the wrong button.

The only answer that really made sense. Damn.

Thanks for letting me know.