when building forms, you can re-oder the questions, using the Bodycopy and 'building' the form there. Is there any way to control the order in which the responses display in the csv (ie questions asked 1,3,5,2,4 - usually as a result of a client changing their mind, but responses displayed 1,2,3,4,5). Not a problem really until a survey is upt to 100 questions long!!
There is no way to change that order. Matrix always keeps the original order so it doesn't get confused when exporting old submissions where the question name or order has changed.