Adding weight doesn't guarantee usage of trait element

[jasan-s]

In the following example for headwear layer with None element has 30% weight and remaining all have 10% each, see code.

      {
        name: "Headwear",
        elements: [
          {
            id: 0,
            name: "None",
            path: `${dir}/headwear/none.png`,
            weight: 100, //30%
          },
          {
            id: 1,
            name: "Headphones",
            path: `${dir}/headwear/headphones.png`,
            weight: 70, // 10%
          },
          {
            id: 2,
            name: "Beanie",
            path: `${dir}/headwear/beanie.png`,
            weight: 60, // 10%
          },
          {
            id: 3,
            name: "Brain",
            path: `${dir}/headwear/brain.png`,
            weight: 50, // 10%
          },
          {
            id: 4,
            name: "Birds",
            path: `${dir}/headwear/birds.png`,
            weight: 40, // 10%
          },
          {
            id: 5,
            name: "Tattoo",
            path: `${dir}/headwear/tattoo.png`,
            weight: 30, // 10%
          },
          {
            id: 6,
            name: "Zombie hat",
            path: `${dir}/headwear/zombie hat.png`,
            weight: 20,// 10%
          },
          {
            id: 7,
            name: "Alien headset",
            path: `${dir}/headwear/alien headset.png`,
            weight: 10, // 10%
          },
        ],
        position: { x: 0, y: 0 },
        size: { width: width, height: height },
      }

Expected:
With editionSize set to 100, Out of 100 output files, each of non-None elements(Headphones, Beanie. etc) should represent 10% of the headwears and 30% of files should have None headwear

Actually Happening:
Some headwear elements are not included in any outputted files.

[calebharris216]

Yeah these rarity weights are unbelievably confusing. In one of the videos he says to have them ordered from highest to lowest with no duplicate values, though even when I account for this, whatever element I put at the top gets vastly overrepresented. I am struggling for answers.