I thought it needed repotted so I did repot, or at least add some dirt at the bottom and the top. My african violet is 8, it has over its life had many leaves and the stem is over 6 inches long with the roots way down at the bottom and the green part at the top. What should I do for it?

I found this article at the Violet Barn link is below. I have no experience with a 6" long neck. Someone more experienced might have more to add.
Miss Orchid Girl has a video on YouTube that covered this topic but I am not remembering the name.

https://www.violetbarn.com/pla...

That is a great article, Thank you @Darwin101

Here is a video from the African Violet Society of America

https://www.youtube.com/watch?...

LOL, I had the African Violet in the photo below for about 8 years and it got so neglected that it's long neck had it looking like a Palm Tree.

Mine was a curly palm tree and people in the succulent forum used its upright habit as a low light example (got a lux meter, lighting was fine, lol). Anyway I followed the instructions on the first reply and cut it off about an inch below the bottom leaf and started new dirt, watered, in a plastic bag. I'll check it in a couple of weeks. At least I kept it alive for 9 years. That's a first

Lin I love your little violet palm tree!

Speaking of aging neglected violets. I keep looking at this mutantly huge mess and putting off a major overhaul. It's almost always blooming, so I keep thinking I'll wait... I toss water on it when it gets droopy, try to deadhead before the dead flowers drop into the cat's food bowl below, but otherwise, no care. It's about 18 inches across. I think there are two stalks in there.

I need help along with Moasis above!
Question 1: I have my violet ( also about 8 yrs old) in the largest self watering clay pot I've seen. The opening is 6 in. Across. Constant blooming but I think it may be time to replant. I have rooted 2 leaves from it but still don't want to lose it. What pot would be a step up?
Question 2: I watched the YouTube video ( thanks so much). And I have my 2 leaves in a 2.5 in. Planter with a zip-loc over it. Haven't seen new growth yet. Video says 2 to 3 months. Do I leave the zip- lov on the whole time?

I left mine in the ziploc for several months, had beautiful root growth and a couple of leaves, but I believe I should have tented to remain more humid after I took bag off. it was in a clay pot, got too dry, and died.

>Question 1: I have my violet ( also about 8 yrs old) in the largest self watering clay pot I've seen. The opening is 6 in. Across. Constant blooming but I think it may be time to replant. I have rooted 2 leaves from it but still don't want to lose it. What pot would be a step up?

You can move up, but AV growers do not recommend. First of all, if you happy why would you change anything. Wait till it shows some decline like loosing leaves, not flowering. If you still want to repot, you can remove lower 1/3 - 1/2 of lower part of roots and add fresh soil in the same pot. In nature this plants grow in a very tight spaces.

>Question 2: I watched the YouTube video ( thanks so much). And I have my 2 leaves in a 2.5 in. Planter with a zip-loc over it. Haven't seen new growth yet. Video says 2 to 3 months. Do I leave the zip- lov on the whole time?

How fast you will see little plantlets depends on the variety and on the season. In spring and summer the new plants appear twice as fast as in winter. Zip-lock absolutely needed until the leaf produced the roots. After that it is up to you, but increased humidity speeds up the process. I usually keep the leaves with small plantlets covered. Sometimes, if I see some fungus problems, I put them on a wick without the bag. The main idea not to let the soil get dried as it is really slows down the growth.