I've found two bugs In MCW10E

1. Nether Portal Glitch

So I was playing a singleplayer world and found a ruined portal with a chest with four obsidian in it. I broke one crying obsidian and replaced the missing blocks with obsidian and lit it. But when I went into the nether... there was no portal. So my world is currently nether only until I can find obsidian, flint, and iron.

2. Shield blocking view

Another bug that I found was when I had a shield on and then tried riding a horse. It blocked half my screen so I can't see where I am going. I've attached an image.

If anyone has encountered these bugs and have posted it on here already, I have wasted a few minutes of my life.