ZME Controller voiced concern regarding recent automation changes that have added additional controller workload and confusion.

Narrative

Changes to HOST programming have caused filed flight plans with the routing BNA.RMG4.KATL to require a manual update via a route amendment message or a URET entry to correct the actual flight plan for this flight. The HOST deficiency indicates to the controller a 'red or blue' routing; a PAR; is required for the flight. The flight is currently flying the RMG4 arrival; no need to reroute other than the fact that the computer system is BROKEN! This problem is exacerbated by two other existing anomalies currently plaguing the ZME AREA 5 HOST software without resolve. 1. The failure of the AUTO HAND-OFF for Sector 63 to Sector 62; ATL landing traffic over BWG. Previously reported. 2. The loss of the reroute key function DIRECT RMG. Previously reported. 3. Today's latest and greatest. Since the last tape hang-up; aircraft routed BNA.RMG4.KATL indicate a 'blue-routing' BNA.ERLIN9. In other words; Area 5 must manually intervene to correct the computer deficiencies once again. In the interest of safety; one would expect solutions to these problems beyond our manual interventions. Quite frankly; I find it repugnant that the ERAM excuse will be the savior of all.