Wrong assets are showing on some devices

I am using Aero on my PC to create a file. I open that file on my Ipad to preview the file.

Now sometimes it says the file is still open on my PC and it makes a copy. Thats fine for testing, because I only make changes on my PC.

Sometimes I have to change the assets so I replace the file. And here is where I think it goes wrong.

I makee a QR code, and when I scan it and open it, to use the file on my same Ipad, it sometimes shows the wrong assets. (Like it remembered the assets, from the copied files that are also on my tablet).

When I use my phone, or PC the right assets are shown.

When I deleted the earlier copys that where made on my Ipad, the problem seems to go away.

I use the Ipad and QR code to show the files to clients, it's very annoying if an asset is the wrong asset. 

Does anybody ever have the same issue?