LrC does not recognise duplicate pictures during import from camera

[Mathias22533460w96a]

Hi, 

there is a problem I'm not able to solve by myself.

I have imported some pictures from my camera to my iPad in Lr on the go. The pictured synced with the cloud and back at home with LrC on my PC => so I got the RAW files now in LrC.

After that I wanted to import the rest of the pictures from my camera in LrC but LrC didn't recongnised that there are already some of the pictures already on my PC. I even chosed the same folder where the pictures already are and they still have the same file name. When I import them anyway, LrC renamed the new duplicated picture with a - 2 file ending.

Has anyone an idea how to solve that? 

[GoldingD]

Just to check, you have checked on the option Don't Import Suspected Duplicates, correct?

[Mathias22533460w96a]

Yes, correct. The option is on