Hi  fnguyen, The NAT related issue has already been fixed as part of CSCvp67520 and is available as part of ASDM 7.12.2 release. For the VPN issue, could you please reach out to TAC for support? Thanks Kaushik Swaminathan

You cannot manage ASA code via FMC. If it is a single device, your option would be ASDM for GUI or if many then CSM