central locking

Hiya, I have a 51 plate octavia ambiente. The drivers door barrel has been replaced at some point and has a different key and doesnt operate the central locking so I use the remote or the boot lock.

When operating the central locking from the drivers door inside the vehicle the passenger door locks and springs back up again and always has.

This last 2 weeks when locking with the boot lock it has started doing the same and the alarm is not set, but this is an intermittent fault, sometimes it will lock all and set the alarm, sometimes the passenger side will jump back up.

Many thanks