"you can ONLY buy even amounts of Crysta while the billing service is an uneven amount of money."

I used Ultimate Pay (VERY easy, and friendly too use compared to C&B). I bought 795 Crysta as I had some left over from my FFXI Crysta purchases. Took me about 20 seconds. No reason to complain really.

Also, I don't mean to be an ass, but if you can't figure out this process when they posted a guide how to do it on the lodestone. I don't believe for a second you're in college or filled out a FAFSA.