The outer layer of my skin is showing up on the inside of my skin

I’ve been playing Minecraft for about a month now, and I’ve made a couple skins, and both of them have an outer layer. They don’t show up on my screen, so I thought it showed up for everyone else and that it was just a glitch.

While I was doing a modded survival, I accidentally went into the front view mode while mining a tree. Then I saw the outside layer on the INSIDE of my skin. I was hoping I could get some help on why this is happening. I’ve added screenshots of my outside layer on the inside and my two skins to see if anyone recognizes what’s wrong.

• 
•