The whole thing reminds me of the dancer Sophia Lucia and her record for the most turns in tap shoes.
Just a way for these athletes, who are supposed to be part of a team sport, to get individual attention for being "better" than everyone else. I guess sports like baseball, football and basketball keep track of individual athelete accomplishments inherent to the sport - but since cheer doesn't do this, these ambitious individuals are finding their own ways to make their supremecy known.
I would think there are many people out there more than capable of beating this record - of course, very few of them would probably desire the attention enough to go to the extreme of bringing in Guiness, going on TV, etc. Of course this is probably true for a lot of the records in Guiness.