Possibly rooms booked for that week with MLK day being Monday prior, some people utilize the week with a day off school, and may not be checking out till Sat or Sun. I don't know if you tried booking one day at a time, sometimes there is availability one day at a time vs a block of days - not sure why, but something with the system. If so, you can call and they may be able to link them. Or can't get same room category for all the nights, but might get preferred for one night, then standard for others, etc. Might be able to find rooms that way - way too complicated, I realize, but just throwing out things I found when trying for rooms this fall.