Name sort in finder recognizing number values, not sorting letter by letter
El Capitan 10.11.3 Macbook Pro (Retina, 15-inch, Mid 2014)
I have a finder window open to a particular folder viewed as a list. I clicked on the Name column and the files are listed alphabetically in ascending order....almost. The following file names are not actually alphabetical because it seems that Finder recognizes a document number in the name which starts with a higher number in the first digit, but is a smaller number overall. Is this an old problem that everyone already knows about and I've just missed the solution? Apologies if this is the case. Can you please direct me to where I can learn how to sort these letter by letter?
thx
MacBook Pro with Retina display, OS X El Capitan (10.11.3)