Thread:Support/Category:Supported projects vs. Special:LanguageStats vs. Project list vs. MainPage

I was trying to figure out how many active/supported projects there are on Translatewiki.net and I discovered four separate pages giving me four separate numbers.
 * Special:MainPage: 25
 * Category:Supported projects: 34
 * Special:LanguageStats: 28 (counting translatewiki.net messages as part of Translatable pages)
 * Project list: 18 (depending on language)

So my question is simply how many active projects are there and which of the three pages should I be referring to when advertising translatewiki?

I also see that some projects seem to be indecisive as to whether they are supported or not (Category:NOCC is unsupported but Translating:NOCC thinks it is supported and it appears on Special:LanguageStats+Project:News.