Try this one

[Zeke5]

Hey guys, this may not help you out much because I'm
drawing from American Federation rules ... but I'll give
it a shot, anyway.

There's a couple things here:

1) If the loose ball was kicked off the ground by the
punter, you have an ILLEGAL kick (15yds)at that spot in the
end zone. By All-But-One, the enforcement spot would be in
the end zone which would result in a safety if B elects to
accept the penalty.

2) The force that put the ball back into the endzone after
R muffs is still the kick, legal or illegal.

3) Scrimmage kicks, when ended in joint possession, are
always ruled in possession of R no matter who touched
the ball first or if the ball crossed the NZ. BUT, a scrimmage kick is defined as a LEGAL kick (punt, place or
drop).

So, if the punter punted the ball, you have a touchdown for
R. If the punter kicked a loose ball, K would be ruled in
possession in the end zone and it is a safety.

I hope I never see this one ...