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As for the green bloom, are you absolutely sure it's supposed to be red? Some are bred to be green. That being said, a colored one that changes to green, or never turns colored, may have insufficient light, or the minerals may be too high or too low. Also sometimes they're green for no apparent reason. This article has good information on growing anthurium: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

The most likely cause is that the soil is staying too wet. This damages the roots and allows a variety of fungal diseases to invade both roots and leaves. Anthuriums are notoriously difficult plants because their range of adaptability is small -- that means they like exactly what they like, in terms of soil moisture and light, and can't adapt very much to conditions outside the optimum. Try increasing the light a bit, increasing air circulation ( a fan), and allowing the soil to go longer between waterings (but don't let it dry out, they don't like that either.) Here's an article with more tips: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

Anthurium is a totally tropical plant, related to philodendron and peace lilies. Temperatures below 40F will kill it. But it can make a lovely indoor plant during the winter, then you can move it back outside during the warm months. This article has more information: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

It sounds like fungal leaf spot. If possible, trim away infected leaves and make sure the leaves stay dry. Normally this issue will clear up on its own if you do this. Keep it away from other plants though as it can spread. Also, treating the plant with neem oil spray may help.

The most likely cause is that the soil is staying too wet, and root damage is starting. Anthuriums are more fussy than many common houseplants. Test the soil for moisture near the bottom of the pot, not just the surface of the soil. This article has some tips on moisture testing: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
Using a moisture meter, the meter should read 1/2 to 3/4 of the way between dry and moist.
Another thing to try would be to move the plant to higher light, like an east or west window. Sometimes I've had to move plants around several times to find each one's "happy spot."
This article has some more general information on anthurium: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

There are many reasons why an anthurium turns green, such as the species, aging, or incorrect cultivation, all of which are discussed in the article below:
https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-turning-green.htm

The flower-like spathes will not turn back to white unfortunately. The spathe will eventually die at which point you can cut it off and grow the plant on as a foliage houseplant or start the process to force more blooms.