DigitalVolcano Software Support

I DUP purchased because of the enthusiastic messages on the Internet. I was initially too happy. DUP took a lot of pictures, many of which were double. After moving the duplicate files to another (backup) directory, single files were found missing.
After again make a scan, DUP blocked index after about 6 hours.
The reason I could not figure out because the log was not turned on.
After the log had switched again make a scan and fix again DUP ran. Despite the fact that I had not seen on any log entry to the log.
My questions:
How is it that the DUP single files "somewhere" is put on the HDD, so moved, and it did not leave the original folders?
Why DUP has first gone through all the files (about 28,000) and DUP then blocks the next scans?

I hope you can give me a good response and solution.

The translation from Dutch to English by Google translate. Possible that there are errors in the translation.
Kind regards, Ton

> single files were found missing.

Might you have marked all the files in a group?
(Thereby moving all the files in that group to your backup.)

Thanks therube for replay.
No, I have not marked all the files. The selection of DUP I left as it was, so each group there was always only one marked. .