Using flight data csv

Yes, the telemetry for the flight logs is logged at 10 Hz which is how fast DJI supplies it. The 'Photo' mark shows the location of the trigger of the camera and the file name the follows is the image that gets written to disk.

It shouldn't be restarting at 001 since the file name that shows is what gets written to disk. Even if there is something weird going on there we can't do much about that. On your most recently posted flight log the flights start at DJI_1086 and DJI_5845, not 001. This information is available on the Flight Detail pages on the Maps Made Easy site after the flight logs are uploaded. 

So I will filter the records to just the 'Photo' rows.

The files numbering is being reset at 0999; DJI_0001 was the first image on the disk. I've turned off the feature in DJI Go to reset file numbering so hopefully that will solve the issue but a heads up that what is written to disk isn't what is supposedly written to disk.

That would work. You really want the photo marks and the filenames though. The filename that gets written to that column is the filename that DJI reports to us as being written. We can't do anything to change that.