Linux Mint 19 cinnamon shortkeys mixed up

I just got Linux Mint 19 cinnamon installed, and CTRL and ALT keys work as SHIFT. The problem won’t be solved in system settings. Help please!

Hello,
Please follow the link below
These Linux Mint shortcuts will make you a better Mint user, because you’ll find that using keyboard shortcuts for snapping windows, copying texts etc. are much faster than using mouse.