Oh sorry, I misread your comment and that you were referring to a specific piece. Are you talking about the vibraphone part in the beginning? If so, I think you did it right. I wouldn't consider those little dips of the top note to be a chord change, but just a neighbor tone (https://en.wikipedia.org/wiki/Nonchord_tone#Neighbor_tone). So I'd treat it melodically and just put it on the adjacent line, with whatever accidental works. Like you did!
And then I think you may be talking specifically about measure 11. I'm pretty rusty on my analysis, but it seems like it's the iv7 chord, but starting and ending with a chromatically raised root, which is slick because it acts as a passing tone from the i chord in measure 10 and the V in measure 13. I would probably do Gb -> F -> Gb, because the F is the chord tone, and the Gb is the nonchord ornament. But yeah, probably doesn't really matter!
And then I think you may be talking specifically about measure 11. I'm pretty rusty on my analysis, but it seems like it's the iv7 chord, but starting and ending with a chromatically raised root, which is slick because it acts as a passing tone from the i chord in measure 10 and the V in measure 13. I would probably do Gb -> F -> Gb, because the F is the chord tone, and the Gb is the nonchord ornament. But yeah, probably doesn't really matter!