daump

I am totally new to this game system, but played the demo for countless hours yesterday and today. The question I have is there a cap on XP. I have been following a favorite pair of Japanese pilots, and after my last sortie I started with 4 unspent points, was awarded 14 for the sortie and afterwards I went back to review said pilot and he still had 4 unspent point. Is this a bug, a limitation of the demo or a rule I am missing. PS: Have been having a blast