Lol This happened to me once. I was doing a quest and it kept making a weird noise whenever I'd talk to the NPC. My friends list was all screwed up as well. Everyone was like lvl 300 and stuff. xD
Well at least now we have a idea about how far they might take the lvl cap too
it's just a variable , the game might never go that far or might go over it , i've seen before games that had certain stats limited because of the variables , if it's needed they will change the data type