USB booting :: Strange BIOS!



I have a BIOS, where you can't choose booting from USB, but it still boots from USB!?
(Quite new ASRock something...)

The only booting options are
1 cdrom
2 floppy
3 hard disk
And I can change the order in which they are booted!

but It always boots from USB first (if bootable USB connected)
And yes I did go through all the menus in the bios, and there wasn't anything about USB...

STRANGE  ???

is this a new trend or something?

nope

original here.