Scatterplot not showing all labels

[gvwilson]

1. Drag out penguins data.
2. Use k-means clustering to create 3 clusters on bill_length_mm and flipper_length_mm.
3. Add saveAs block and inspect - most points are in two clusters, but there are a few values in the third cluster.
4. Add a scatterplot block, coloring by cluster label.

Only two colors are shown in the plot and in the key.