libgutenprint versions macos

Building v5.3.5-pre1, I get libgutenprint.8.dylib.  This seems odd to me as v5.3.3, produces libgutenprint.9.dylib.  Seemingly a higher version.  Is this correct? 

When I run otool -L, the versioning seems logical with 
v5.3.5-pre1  ----- otool -L libgutenprint8.dylib shows a current version 15.0.0
v5.3.3      -------- otool -L libgutenprint.9.dylib shows a current version 14.0.0

Everything is working fine, it was just a bit odd to see a lower number for libgutenprint.x.dylib.

Matt