Your explanation makes sense.

The order of evaluation of the comma operator is defined as right-to-left. update2: or maybe not. see discussion below

see Terms and List Operators (Leftward)

update: I just tested this, and then I remembered that function arguments are aliases. Which throws the whole thing off. 

perl -e'$i=1;sub a{print "@_"}; a($i--,++$i)'

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"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: eval order of args to a sub by Joost
in thread eval order of args to a sub by otto

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