Guild Wars 2

I use Control key for Vent push to talk. If I am talking on Vent while in a battle I inadvertantly place a target marker then everything i do shows up in chat, which is annoying to the guild chat if that was the last place i chatted or it send battle comments to the last person i whispered.

I looked at key bindings and changed the Target command from Ctl to something else and it continues to tag targets with the control key.

Key binding doesn’t seem to resolve this issue.
Is there some way I can disable the combat messages from showing up in chat?

I tried changing the Vent push to talk button, but i’ve been using it for so many years that way that even if I change the keybind for vent, i still keep hitting the ctl key by mistake and same thing happens.

Is the key bind for the Control Key indeed not working and if not, then what should i do to prevent these chat messages?