College FT Lane spots

[mplagrow]

I ref mainly 8th grade ball, NFHS rules, 80-100 games a year. I do a little bit of high school when opportunity presents. I don't follow much college ball, nor do I know NCAA rules.

I was watching Wake Forest/Cinncinnati today, and I noticed that when they line up for free throws, B1 and B2 on the baseline are all over the block. Not only are they all over the block, but they are actually leaning on guys in the next lane space. What is up with that? Is that another rule that I have to ignore to advance to the next level, or is the NCAA rule different? How's a guy supposed to know what to call and what not to call? Anyone that can shed some light on this, I'd appreciate it!