Looking at your photos, I'd suggest the following:
1. Measure the platform. The platform diameter needs to be the same size as the yurt. If it is smaller- that is your root problem.
2. If the platform is too small (and it appears to be), you will need to take down the yurt and re-build/re-size the platform to be the correct diameter.
3. When you re-pitch the yurt correctly, it will likely fix the issues you're having with the rafters and
. The
ring is probably off-level because of the other issues. The rafters are not always perfectly spaced in a properly-pitched yurt, by the way.
4. Many of the "improvements" done (the plywood wall board, etc) are not anything we provided and probably need to be removed.
5. If you find you need replacement parts, let us know. We can sell you what you need to make the yurt like new. I'll email you a price list for the common parts.