I'd recommend contacting TAC on both of these issues. The first issue is a probably a duplicate entry of the DTMF ID in the DTMFAccess table. TAC can assist in cleaning that up.
For the second issue, it sounds like it may be CSCdw88890. I have a feeling that there's more errors in the event log than just that one.
If you need help right away, TAC is a better resource than the forum.
Steve Olivier
Software Engineer
Cisco Systems