Load Balancing to Only One Pool Member

So it looks like in this environment (load balancing traffic from user sessions on Citrix servers) there is some issue with the combination of an http profile, onceconnect profile, cookie session persistence, and the least connections (member) load balancing method. When changing to Observed (member; retaining cookie session persistence and other profiles) our load balancing issue was resolved. According to F5 this is related to CMP in a manner I do not understand.