Interesting.
Site 2-65 is one that hasn't yet been listed because it didn't show up in the neighbor/peer lists of any of the other nearby sites.
I wouldn't think that it's a simulcast site of the Seneca site if it's listed with a separate site number and unique set of frequencies. Callsign WQSL478 would appear to correspond to that location and set of frequencies.
If I had to guess, I'd say it's a new site that is still being built out. It is likely intended to improve coverage in the far NW corner of the state/county which is very mountainous. It probably hasn't been connected to the core controller, which is why it doesn't show up as a peer, and doesn't show any peers, and doesn't carry any audio traffic. Perhaps those repeated call grants on TG 65536 are used for range testing.
Thanks for posting, and keep monitoring it. Let us know if something changes.