David,
Thanks for the great explanation. I was mis-reading the above as United 300 STOP Bonus 300 (equalling 600 PTS) as opposed to
"United 300 Bonus": 300
Now me gets

Either way, didnt know it was combinable with GP2Ks so was very pleased to read your post. Have sent GP an email just today as I fly WN weekly to LA.
Cheers.