Describe the bug
A clear and concise description of what the bug is.
When I added two things to the Sieve Registry, it showed up under a different mesh then what I had set it to. Example in image below

{
"input": "minecraft:gravel",
"result": "ars_nouveau:mana_gem",
"rarity": 0.02,
"mesh": "IRON",
"isWaterlogged": false
},
{
"input": "minecraft:gravel",
"result": "forbidden_arcanus:arcane_crystal",
"rarity": 0.02,
"mesh": "IRON",
"isWaterlogged": false
},

To Reproduce
Steps to reproduce the behavior:

1. Place block '...'
2. Right click on '...'
3. Do thing '...'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Version
Minecraft Version: 1.15.2
Forge Version: 31.1.61
Ex Nihilo: Sequentia Version: 2020-08-09-11-59-99

Additional context
Add any other context about the problem here.
Stack traces and log files are nice to have. Submit all files through Gist or Pastebin and place the links here.

That's happening because you have the config flattenSieveRecipes set to true. JEI will show all the meshes that it can be produced from. Can you confirm that it doesn't show on flint or sting meshes? If this is the case, and it is only showing up on iron and diamond meshes, then this is the intended behavior.

Fixed disabled flattenSieveRecipes