Well, do they? Double modifiers remind me of the Monthy Pythons The Meaning of life scene in school
Now before I begin the lesson will those of you
who are playing in the match this afternoon move your clothes down on to the lower peg immediately after lunch before you write your letter home, if you're not getting your hair cut, unless you've got a younger brother who is going out this weekend as the guest of another boy, in which case collect his note before lunch, put it in your letter after you've had your hair cut, and make sure he moves your clothes down onto the lower peg for you. Now...
The "and" version is certainly supported, but I would not consider it the recomended version.
There are already people that disapprove the use of statement modifiers completely, I would not go that far, but I'd only recomend using them if both the statement and the modifier is fairly simple.