Just found drones ignored some yellow box which had been set(confirmed they are in the transport net and set requirement)
I didn't figure out how to post a image here,so I will use the smilies to show
resource came from southwest,so clearly these two shall be filled earlier
the means the box is full means this yellow box‘s requirement was delayed means waiting for fill
quite weird huh?no idea why this happened,luckily this won't be a trouble.
I am not sure how to read your "screenshot" exactly But the logic of how bots will fill storage chests is explained here: https://wiki.factorio.com/Storage_chest
You can just copy and paste an image directly into the text box (you'll want to then wait a bit for some magic text to get inserted), or click the attachments tab below the textbox and click add files.