"tail" Is Returning the Wrong Requested Number Lines

I'm trying to use the following approach to subset the output of a manual: man dig | nl | tail -n +389 | head -n 6 However, the output starts at line 304, not line 389. Doing some research, it seems lines marked as "#####################" are not counted. This is very aggravating, and one of my current books was using this approach to subset number lines. Is there any solution to fix the overlooked lines?