Step 3: The strategy is go for big number, I recommend go for 1000, then go the next CAS Part on the list on the left side, change number up by the unit of 5, so it will be 1005 Step 2: When the package is opened, (1) click on Warehouse Tab, you can see the list of CAS Parts on the left which control how the swatch behave, (2) click on the first CAS Part, (3) on the right side, type sec into the search bar, (4) SecondaryDisplayIndex will appear, you want to change the number next to it.
Step 1: Open Sims4Studio, click on My Projects, locate the NON-DEFAULT eyes package you want to re-sort, and open it. And if the palette goes beyond the EA colors and/or more swatches and/or sort differently by cc eyes creators, it will be like picture above. So originally, most nondefault eyes are made with the sorting order from 0 to 100+, which gonna make 10 different styles of green eyes in around same spot of EA green eyes, for so they mostly sort by colors. I really apologize for my lack of knowledge when writing this tutorial.
EDIT: Sorry to any people follow this tutorial before I edit this, you should follow this tutorial instead for faster method, both works fine but the other tutorial is much faster and easier. If you are using 2+ non default eyes like me and you are borthered by the swatches are mixing up or hard to find the eyes you want without having a headache.