VR glasses double image?

I bought VR glasses today and have been trying to use them and adjust everything for 4 hours. Unfortunately I have a double image wherever the app is displayed in full screen mode (i.e. The image is offset). When I use an app and have full screen mode off, everything is perfect.

Mobile phone: Huawei mate 20 pro

VR glasses: DESTEK V5 VR glasses, 110 ° FOV (https://www.amazon.de/dp/B07WMN1GY4/

Can I do anything to use it normally in full screen mode or have full screen mode disabled? Need VR in YouTube and Chrome.

Apps used: Cardboard, Sites in VR

Thanks in advance for the help

Image 1: The point in the middle is offset -> the complete image is offset

Image 2: Full screen display (only comes with 4 apps on my mobile phone)

But you know that VR works stereoscopically?
So there must be 2 pictures that are a little offset from each other.

Yes, but they are offset too far. I have now readjusted and then pushed the lenses outwards. Everything is still blurry but not slightly shifted.