What Jim said and from the manual...(
http://nutcracker123.com/nutcracker/releases/XL4UserManual_v1.2.pdf)
The Actual # of Strings corresponds to the physical number of strings for that model. Typically an arch or
a candy cane will have one string, but models such as a mega tree or a matrix will have many strings.
See the examples of a Mega tree and matrix below.
# of Strands per String is usually 1, except in the scenario where a physical string has been
folded in which case it can be 2, 3, 4 etc.
Pages 39 & 40