I'm glad they did nothing so pedantic as explaining the discrepancies of staging and makeup, playing them instead as an inside joke.Did the writers have any farther reaching ideas about this at the time? Kang, Koloth and Kor appearing in S2 with ridges doesn't get as much scrutiny, maybe since there were no TOS Klingons to compare them to.
And then, did they feel compelled to revisit and expand on the matter on Enterprise?