The location you reference is well within the Sussex site footprint - I would not expect to have any issues receiving at that point. The site should be receivable north of Milford and Slaughter Beach.So a little updated observation:
When I got about a mile away from where I was staying (near Indian Mission Rd & John J Williams Hwy) I would pick the signal up fine. It was just when I was at the house I was staying in that I would be out of range.
I suppose it’s just a dead spot at that location 🤷♂️