files not syncing

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Hello guys!
We have encountered a problem which is recurring since we started using the fs7(MFX)Some files are syncing and some are not. We have tried and dubbletried but no success and we can’t figure out what the problem is. I have uploaded some screenshots for you to look at, please see if you can find out what the deal is. The project was filmed on the same day. As you will see, some clips don’t match for some reason.

Thanks!