I noticed that sometimes (looks like it depends on the item type), when I set the item type of a chest, it doesn't really work until I close the menu.
For example:
1) I create a chest
2) I open it's menu and select "iron plate", but the item that appears on the "left side" of the menu is "copper wire".
3) If I close the menu and open it again, the left side is correctly set to "iron plate"
This is not just visual. If I place a inserter between steps 1 and 2, it will extract copper wire from the chet until I close the menu. Afterwards it will start extracting plates.
The weirdest part is: I am only using "surface chests" and this happens even on new surfaces. I just reached fulgora and the issue happened. I don't know if it is seeing items from chests on other surfaces or what.