Is there supposed to be scenario's for each year of the war, as it hints at in the set-up section. My copy of the rules only has an 1861 and 1864 setup?!
Are your rules damaged? There are set ups for 61, 62, 63, and 64 scenarios with the 61 set up doubling as the campaign start. Rules are available free from my website,
I would replace whatever you are using with a full set.