|wanderer is correct to make it easier to understand.|
the vpn is like a tunnel that has an open end at the router in question and goes all the way to the target. once traffic is in it, it cannot escape untill it reaches the end of the tunnel and like wise outside traffic cannot enter it.
it sounds like the router in question has been set up with this tunnel to say any traffic i dont know the destination for put into the tunnel.
what you are looking to set up is a routing rule that says if this traffic is destined for the pcs on the other router send it there otherwise everything else put into the tunnel and let what is at the other end sort it out.
all text needs typos. There there for the reader to find,to distract them from the total lack of content.
google it! wasnt the answer to the question i asked so dont be dense and give me that repl