Need help in regards to nginx plugin setup

[Timeraider]

Good day,

There is no doubt that I am doing something wrong, but I would like to figure it out.
I used to use the reverse proxy on my Synology NAS which basically was an extremely simple UI whereby you point 1 thing to another
Due to the fact that im setting up some services on another device as well I imagined the best way to handle this is  reverse proxy it from the router.

Now.. ive used the tutorials online to at least set up a basic setup, however I am running into an annoying issue already. Even though at http server ive got the servername set to aaa.domain.com, it also proxies domain.com, bbb.domain.com etc. etc. so basically.. all the other subdomains as well.

My setup right now looks like this:
httpserver


location:


Upstream:


Upstream server:


traffic stats screen:


firewall rule:


I also have Unbound set up with all the subdomains so I could access them from inside LAN. Not sure if that influences anything.

So basically wondering why its proxying more than im telling it to?

Any general tips on setting it up with a good few subdomains that will need to be directed to different IPs would be appreciated as well.

If I figure anything out in the meantime ill be sure to update.

[Timeraider]

As additional info ... http access logs dont actually show anything for the last few hours regardless of me opening the website on multiple devices.
When I turn off nginx however, none of the websites are available so not sure how/where it is actuallly allowing in the other subdomains