James roby scored one against wakefield in 2005 or 2006 after david solomona pushed him after he had scored a try. Jamie Lyon was on hand to convert both efforts

That's what I thought. Once the act of scoring is complete, a penalty can't be awarded; the only action that can be taken then is a ticking off or the showing of a card.

Always the best time to 2@ somebody, the ball's dead, the only restart is a kick off.

I always thought the "8pt try" was if someone had commited foul play either while atry was being scored or just after it? If I am wrong please explain it to me (I've only been watching 22 years and playing 14 years, you'd think i'd know the rules)

In the act of scoring

When I was coaching a few years ago in an U16 game we had a '10 point try' awarded against us