For about the past 5 years i have been using Paragon software with a version (that came with a hard drive i had bought (seagate of cause).
Back then i was using snow leaped and would experience little odd copy problems that at the time i put down to my data being corrupt.
And over the years strange little problems that i could not pinpoint a common cause (I forgot about the paragon software)
The software that came with the hard drive would only work with seagate drives so i have for a whole now been using V12 of the software (trial version) until recently i found that my ntfs drive was not being mounted again i thought it was because of corrupt data (computer has been turned off incorrectly a lot) and did not think much of it. Then i found that if i remove the paragon software it would all work tho i did not have write access. I found that this was a problem in recent versions so i went back to the really old version i had and found the same problems. So i then downloaded the latest version V14 and it all seemed to be working correctly.
I Thought that is fantastic they have fixed there little glitch that maybe occur in later ver of OSX as i am now running Yosemite.
At this point i was about to buy the full version paragon (What a waste of money that would have been)
Well So now it am finally decide to sort through my really big mess of data and file it so i can find things and also have a better backup copy.
I start doing this and again i have these odd copy problems and now i all so find the same odd problem that you have displayed in your post of double copies that just should not be possible to have. Still thinking that there must be a data corruption maybe i look for someone else that has had the same problem.
Took me a day to find your post and it is the only one that relates to just how bad paragon is as other peoples problems where to do with illegal characters and this was not my problem as the glitch is somewhat random.
After reading your post i finally realise that paragon is my problem i uninstall it and problem goes away.
So for the past 5 years or so Paragon NTFS has not only cased me big head aches it has also caused me to lose a lot of data as i had thought that it was corrupt. I cant believe that a company could sell something for so long that is so crap.
I am now trying Tuxera NTFS and it seems to be working correctly so far. Tho i still don't trust it and have decided to keep all my data on an HFS+ partition.
Thank you for your post it has been very helpfull.
Ray