I'm not using any mods. I am a new player and still learning the ropes and you are right that I should not put inserters directly on mining drills.
Thanks for the help.

I have a new issue: Whenever I connect an inserter (doesn't matter what kind) to a mining drill it will always output coal no matter what ore deposit it is sitting on. If I connect a storage crate, then an inserter to the miner then everything is ok.