Factorio Forums

When a crafting recipe produces an item (as a by-product or result) that gets placed into the player's main inventory, an inventory sort is not triggered. If the item goes into the player's hotbar or toolbar, or any other inventory action occurs, a sort is properly triggered.

(overly) Detailed analysis and steps to reproduce:

• Ensure that you have 5 iron plates and 0 iron sticks in your inventory/hotbar/cursor.
• Click the iron stick recipe.
  • 1 iron plate will be consumed, triggering an inventory sort.
  • 2 iron sticks will be produced and placed in your main inventory, not triggering an inventory sort; the sticks will remain at the end of your inventory.
• Pick up 1 iron stick by right-clicking the stack of 2 iron sticks.
  • An inventory sort will be triggered, moving the other stick to the correct slot.
• Drop the stick you picked up on the ground (or into a chest, or anything that prevents it from interfering with the next step).
• Click the iron axe recipe.
  • 1 iron stick and 4 iron plates will be consumed.
  • 2 iron sticks will be produced, resulting in a total of 3 iron sticks in the system.
  • The third iron stick will be placed into your inventory, once again not triggering an inventory sort; the stick will again remain at the end of your inventory.
  • 1 iron axe will be produced and placed into your toolbar, triggering an inventory sort; the excess stick will now be moved into the correct slot.

This is irksome when a crafting recipe produces excess copper cables or iron sticks ([cough]lamp[/cough]), but especially so for science packs, which, being intermediate items, are placed into the main inventory when crafted.
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Hello, thank you for the report.

This had the same cause as the wrong cargo-wagon alt info in fact and is resolved for the 0.10.1 release.