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Please insert your screenshots into your posts so that we don't have to download unknown files. Thanks.
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and your source properties and sequence settings are important. by any chance are any of your sources from a screen capture or smartphone? If so, the problem is probably that they're variable frame rate.
use mediainfo to determine whether your source is variable or constant frame rate
https://mediaarea.net/en/MediaInfo/Download
if it's variable use handbrake to convert to constant frame rate
https://handbrake.fr
and here's a tutorial on how to use handbrake
https://www.youtube.com/watch?time_continue=34&v=xlvxgVREX-Y