... because you abbreviated all of the decade names in the list that you edited. Our style guide is pretty clear on this matter: don't abbreviate.
Your "fix" would have actually broken things that were not broken beforehand.
At this point, I'm going to have to ask you to read the Style Guide.
@Gadg8eer @Labster @Looney Toons @GethN7 @Robkelk @QuestionableSanity @Derivative @SelfCloak