Set the winner count and Spinnza draws them one at a time — Winner 1 of 5, Winner 2 of 5 — with each winner leaving the wheel before the next spin. That is the default because it is easier to follow and much better if you are recording it.
Nobody wins twice
Within one session, each entry can only be drawn once. The exception is duplicate rows: if @alex appears three times because of bonus entries, those are three separate entries and can take more than one prize. If that is not what you want, remove duplicates first.
All at once
Under More options there is a “pick all winners at once” switch. It draws every winner in a single spin and lists them. It is faster; it is also less clear to watch, which is why it is not the default.
Backups
If you might need a runner-up, draw them now as part of the same session rather than coming back later. A second draw a week later is a second draw, and it will look like one.