been there and done that on buying 20 red and 20 blues and had the whole West Side Story thing played out in my tank, so not fun to watch.
Again, make sure you have empty shells for those blues or they will eventually go after the snails and FC.
I hear you on wanting to make the order with SWF.com make sense and wanting to get fish as well, but would advise against it. Anytime I have tried to add multiple fish at once it has ended bad. :-(
Other might disagree with me though.
-Scott