Earlier today I watered my Pothos. I proceeded to water it again about 5 hours later forgetting that I watered it before. I realized this and stopped. Will it be okay

I grow Pothos but I use a very chunky, fast draining potting medium for all of my plants so they don't stay wet for long. If your plant is really soaked and there's the fear of root rot (a good possibility if it's holding a lot of water for a long time) I'd remove the entire plant from it's container and rinse off all of the soil and repot in fresh dry potting medium ... or, you could try the method I've heard a few people talk about: Take a few layers of folded paper towels and sit the pot on top of the towels which supposedly wicks the moisture from the soil into the towels. I've never tried this but it won't hurt the plant to try and you'll know whether it works or not by checking to see if the paper towels get soaked; if so, throw that layer out and pile more paper towels beneath the pot.

I took it out of the pot only to find a small amount of rotting roots! I trimmed the off the rotting roots I could see and put it in new soil. I took it out right after the second watering so It couldn't be from that. Is it normal for some roots to rot away?

Were the roots you trimmed off brown and soggy? If so, they were definitely rotting and usually that's caused by sitting in soil that is water logged. You did right by removing the dead/rotted roots and planting it in fresh soil. Just be very careful with watering. I learned the hard way with Pothos; I killed my share of them years ago by watering twice a week but I also used a heavy moisture retaining soil back that then which added to the problem. I currently have four or five Pothos plants; I use a fast draining mix and grow them on the dry side; I only water about once every three or four weeks but that works in my conditions ... I live in a very humid area so they can go longer without water. Pothos plants do well in bright light; they grows up the trees here in Florida and get huge leaves as they age but mine are small potted plants in the house and on my screened porch and they do just as well in the lower light inside the house as they do in bright light on the screened porch.

I don't know if I got all the rotting roots cause I didn't have a lot of time, therefore I couldn't remove all the soil either. I'll finish the job after school tomorrow. What else should I do? This is the second time this happened. The first time it was Walmarts fault and this time I think it's the nurseries fault cause I only watered it twice and I noticed the rotting roots a few minutes after the second watering. I also watered the plant when the soil was bone dry. WHY DOES THIS HAVE TO HAPPEN AGAIN?!!! Maybe I should have checked the roots before buying the plant.

Dryairfoliage: Sometimes we think the soil is completely dry, even sticking a finger deep into the soil we may detect absolutely no moisture, but some soils hold a lot of water at the roots which will cause them to rot. I think you should just give it a week or even two without any additional water and see if it perks up.

For your very drenched soil, if your container has a drip tray I would remove that for now, put the plant container in a place where it can further drain away and maybe let some air circulate above but not directly onto the plant to help it dry out a bit. Or add more pumice to the soil, so it does give more drainage. Or can you take it in a shaded patio and leave it there for a day or two, that should help the soil dry out faster.

I grow my pothos using water gel beads and leca rocks or just straight water gel beads in a glass container with no drainage, and they grow nicely. I only re-water when the gel beads has shrunken. Maybe you can try that approach, at least you can visually see how the roots grow. Roots are just like any part of the plants that eventually die off, but as long as they continue to grow new ones, they should be okay. Try to experiment on some and see how it goes. Just get a good cutting from your pothos, let it root in that set-up. There are air pockets in between the gel beads and also the leca rocks wicks water, so the roots do not suffer too much.

What kind of soil do y'all use for your houseplants? I've always used MiracleGro.

I use Super Soil potting soil, and I always add a little more perlite too, whether for indoor or outdoor container plants.