I have no experience with the Canon MTS files.
I still use the file joiner software that I mentioned earlier for my Panasonic MTS files.
I recently got a camera that records MOV files and those files don’t need to be joined.
If you put files end to end on the timeline and there is a stutter in the audio/video at the joint, the files need to be joined.
Give file joiner a try, it is really quite simple.
Hope that helps.

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