You could raise the alk slightly to 8.5 or so but the numbers you have work also... There is such a broad range for alk like 7 to 12 I have saw a few times.. I personally like mine between 8 and 9.... If it's holding stable I would roll with it thou nothing wrong with ya got....
Ya If your Tank is settling at that level it's spot on. And if you run any carbon source thats what I've read we need to be at.
That is around what natural sea water is at on coral reefs. I see no difference with 8 or 7's in my tank. When I stick with mid 7's I'm very stable on everything else.