Very minor issue: It seems in the calculation of the current turn for the tooltip display in the upper right corner (sundial) is wrong. E.g. at the start of the 1775 campaign it says [font="Courier New"]"It's turn 304 and 104 turns remain"[/font]. The ledger however shows the right number.
The reason is that Turn 0 is set in 1750...hence in 1775, it's the 304th turn (25,33 years at 12 turns/year) of the game ...but the first turn of your scenario...
I agree it is a bit confusing and should be changed