If you have multiple surveys targeted to the same audience, range of URLs, or the same page, Qualaroo currently does not have the ability to randomize the order in which those surveys are displayed.
We do not recommend targeting multiple surveys at the same audience, as this can result in site visitors getting hit with too many surveys. It can also result in not obtaining valuable insights in a reasonable amount of time.
We do offer a few solutions in our Best Practices article "How can I make sure my visitors don’t see too many surveys?".