Auto strech

I am working on a project in gubase where i am importing audio files into the mix. But somehow cubase always seam to strech or transpose the tracks down by about two steps. I tried a lot of things but nothing has worked yet. Anyone got any suggestions as to why this is happening?

From your short description the most likely cause is that the sample rate of the imported file does not match the sample rate of the project.
When importing a file you should chose to resample (convert sample rate) it.
I recommend to let Cubase create a copy of the file to keep the original as is.