So garage has no detector?
Maybe sensor playing up, when did you have system service last?
Requires some investigation really , seems your circuit is split , but if it's a tamper fault of some kind , while set can show as alarm from what I rember on those
Lock Smith's carry a tool slides over cylinder end tilt up and down fees seconds your done
I didn't have patience to watch video lol if that's what he did
Police say don't lock internal doors as they cause allot of damage
Personally nice loud internal bell , no open plan layout and lock them doors to slow them down , hopefully they just raid the fridge
Chimney breast no big deal , you don't have perimeter protection so intruder would access room either way and trigger it once in
I would move it first personally
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Swap the quads positions with the dt see if problems follow the quad , although as above need to see or have systems described more
Must be reason you opted for duals in other rooms, perhaps list rooms with sensors and why you chose what to go where
So you need to know what ports your DVR uses , those ports need to be setup in the firewall section of your router by creating rules , then those rules would be applied and asked to be sent to your DVR IP address
You may need to set your DVR to a static IP setting if your router does not allow you to port forward via Mac addresses