Table 1 describes the license overview

http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0/index.jsp?topic=%2Fcom.ibm.jazz.repository.web.admin.doc%2Ftopics%2Fc_license_mgmt_over.html

Now an RRC Analyst is need when:

• Creating requirements or collections
  
• Creating custom requirement types in the Requirements Management application
• Creating and editing project and artifact templates for requirements
• Creating and editing graphical requirements artifacts such as screen flows, user interface sketches, and use case diagrams

Is this user performing any of these actions? If not then I don't know why an RRC Analyst license would be consumed because actions like commenting, reviewing and linking to requirements are covered by the RTC license.

Now that said if the user is logging in new for the day, and only uses floating licenses, the floating license server might be randomly allocating the first license it finds that satisfies an action, for example say the user needs to create a work item, any of the 3 floating licenses satisfies this need so the license server could allocate say an Analyst CAL instead of the Developer CAL. It is only when Developer specific actions like source code access or build is needed will the Developer CAL be allocated instead.