Make sure to add a version suffix to your map, i.e. "pl_mixture_a1". This allows people to play new versions without having to delete the old version.
Generally the _a1, _b1, and _rc1 format is used for alpha, beta, and release candidate versions (instead of simply _v1) in order to give testers more information about what state the map is in and what they should focus on for feedback. Usually alpha means to focus on layout and gameplay, beta on detailing, and rc on any last details.