I bet we did it last time as well. Five of us applied for spot #2 (I was appointed to #1 as Whip by Glüc), and after voting the ranking became Lüc - Alex - Edward - Adam - Epic, with Adam dropping out when the Congress was already finished and Edward resigning after two Clarks.
Registered guest MRPTer since April 20th, 2012 (suspended)
Well, I guess there's a chance one of those 3 is going to become Cosa list leader and get spot 1, but if not, well yeah. This doesnt require an extra vote though, the party members will just be asked to rank the three candidates and from the ballots both votes can be calculated.
It's up to you of course, but I would advice against avoiding competition by all picking different spots.
First of all, I believe that usually the members being able to determine the list order might be an incentive for positive competition (as long as we all stay friendly of course).
More practical reason though: Suppose someone retracts, is rejected, or (much more like) appointed Cosa List Leader. Suddenly we now have a hole in the candidate list, which is no problem, but will lead to an uneven distribution of seats.
There is nothing wrong with going for the best spot. First come first serve is not a right. Two persons applying for the same spot does NOT reduce your chances of getting on the list. (It only makes the vote a bit more complicated I guess. )