Nothing about the title seems like an English grammatical mistake to me. In fact, that's how I would say it. Seems like "still" is an adverb modifying "doesn't

Nothing about the title seems like an English grammatical mistake to me. In fact, that's how I would say it. Seems like "still" is an adverb modifying "doesn't". Replacing it with another adverb, like "clearly", in the same position also sounds correct to me. I am a native American English speaker. I grew up in Georgia/North Carolina, if that is a useful data point.