CH7465VF is the same hardware (and base firmware, the only difference is GUI) like CH7465LG - one is VF branded, another is LG branded.. and I'm tired to write it all over again, check your service provider support for help, tinkering with firmware options and other things are just waste of time! BTW, you have fairly recent (if not latest) fw version available.
You have a signal problem (bad connections, ingress or some problem on provider infrastructure to your node), noone can change that except service engineer (or escalate it to higher level of support).. and it's bad luck that VF has