Getting the right sequence from the BIOS is always tricky - different BIOSes have different behavior and in any case YaST can only guess. Please, attach the logs (as I added the link to openSUSE wiki in my last comment), that will help much more than screenshots - we will be able to check exactly which configuration was written to the system. If you can add the bootloader configuration files (/boot/grub2/*), it could help even more. Thanks, Jiri