Most fellas lime to shoot the bottom barrel first, but if the bottom barrel is an open choke and you have a far flying bird - or vice versa , then the other one needs to be used - this is why I like double triggers, they are easier to select than to switch a selector.
Not much of a deal on a clays course, but it certainly is on live birds.
I constantly use the wrong chokes on target just to remind myself that I shouldn't be relying on a particular choke to hit a bird in the field, and sayijg that I should have used a particular choke is NOT the reason I missed , if I did!
These days I'm shooting my skeet birds with the tightest choke can in my pedersoli hammer double - full and modified.
if you don't worry about it but concentrate the hard edge of the clay, the close birds like stations 1,7, and 8 are not an issue.
Cat