Everything what is described to me looks like earth connection problems all around. First thing I would look for is to check, clean and repair all earth connections and check wiring on the connector if wires are broken.
I can confirm that Quick Reply button also does nothing for me as well, while on previous forum software it worked without problems. For attachments I did not checked yet. All version of Android OS with Chrome or Opera browsers.
You should also check brake fliud level, since you may suffer from low brake fluid and your brakes might not work as they should. For your info handbrake light on the dash will illuminate if handbrake is up or if you brake fluid is low.
My Subscribe check box is also filled by default, and it is so from that long ago that I cannot remember when I first saw it. It is also filled everytime when I want to edit my post nevertheless I unchecked it or not when I first created post.
In BCU driven TF both doors are connected to same lines coming from BCU for central locking. If unlocking works on driver door with central locking then wiring (pink and orange wires) for passenger door should be imspected for continuity in order to see if you have some brake in the wires. You said you changed actuator. Was that good actuator?