I think you had better adjust them so that they never come close to each other. This is how they are organized in my mower.
That deck in your picture looks like it has very high lift blades. It also looks like you don't have many hrs on the deck when the picture was taken. Have you had a chance to run it in higher than normal cutting situation. I'm interested because when mowing 5 or 6" high a lot of blades do not have the lift to pull the grass back up after runing over it with the front wheels in a higher than normal cutting situation.