I've used this visual a little before and the legend colour is based on the category. In the Format tab of this visual, you can select this under Data Colors, if you have the Status ( 1-5) under Category.
I've just used a map visual ( completely wrong for the example I know ) but hopefully it illustrates the solution.
Ah, ok, so to correct that you need to set the day to not autosum. The clue that that is happening, is the sigma (Σ) sign next to "day". To get rid of this , go to the modelling tab of the Desktop, and choose don't summarise. You could choose minimum or better yet, define a measure for this.