Stamp is U. S. Scott 212, an 1887 Large Banknote. The Washington Franklin series were smaller, and printed by the Bureau of Printing and Engraving beginning 1909. Very helpful site.http://stampsmarter.com/1847usa/1847Home.html
To see ribbed paper on banknote stamps, view them on edge, with light source casting shadows on the ribbing.
No idea what caused the offset.