As the CSA, when I decide on the cotton embargo option, money is added to my treasury rather than subtracted from it. This is opposite of what the description says will happen.
With the huge amount of spare money for the CSA in this patch, I can overwhelm the North with the demonstration option because I can select to promote many more demonstrations than he can possibly counter, and CSA money is no longer a serious limitation in 1861.
After Tennessee secedes, I'm pretty sure I'm not given the option to build any Tennessee units there even though I can move other CSA forces through the state. The TN units simply don't show up in my available builds.