Shannon has 10 to use. Not sure on how the dates affect it but it could definitely be 6 and I think that is indeed the number
According to this (I googled):
https://www.gobigrecruiting.com/blog/2012/10/everything-you-need-to-know-about-official-visits-2/
a recruit is only allowed 5 official visits. And Shannon has take 4 (us, DePaul, Texas Tech, and FSU) according to 247Sports. I don't know if this is accurate, just reporting what I found.