Both the County jurisdiction and the case number represent the dismissed murder case. IMO, if this was about BM's probation affecting his loss of gun privileges (hunting), the hearing would be heard in Chaffee County.
The hearing is not defined on the docket so my best guess is there might be some evidence seized that BM wants to retrieve. For example, I recall earlier complaints about electronics seized from the residence (cellular phones, ipads, computers, etc) but when asked to specifically identify them, the defense did not follow through. JMO