I have noticed that when I upload the edited level.dat file, I will reset the end dimension and restart the server. I then notice that the changes I made to the level.dat have been COMPLETELY RESET! Is there a way I can prevent that?

Show me your updated level.dat, it is possible that you edited it wrongly, and this would break everything

This is the level.dat. I believe since uploading it to the server, it changed back to normal. I 110% saved the changes using the NBT editor.

This is what I would change it to:

So, the .dat seems fine..i suggest you make a fresh new test world and try doing the same process there, and see if it does the same thing

It's funny because that's exactly what I have tried and it works on my singleplayer flawlessly. I reckon it's something on my server that is discarding the whole level.dat and generating a new one.

Did you manually check in the level.dat that everything revert back to the default values once you start the server? Or you say that because you are not seeing anything new in the End?

Precisely. As soon as I would reboot the server, I will download the level. dat and sure enough, everything is back to the vanilla settings.

My belief is that it's something out of my world file that is causing the problem..

But did you manually check inside the file? I must know that

Yes I did.

I had this happen to me as well when using the biomes o' plenty world type, so I switched to a normal world type so that I wouldn't have to change the level.dat file anymore.

All right, needed to ask that because i had some people reporting that biomes did not spawn, but they simply didn't know that the End has outer islands you have to travel to..

So, BOP is a big pain to deal with, not because either side has some fault, but because of the innate compatibility in how we manage our dimensions..actually i am planning to do some sort of fix to that, in the sense that in case the end biome source is not set to BetterEnd one, i will inject BetterEnd biomes into the default end biome source, much like Endergetic Expansion and Outer End do..but this will come at the cost of not being able to use the custom terrain generator. Also biomes would look a lot smaller

I must clarify that I am not using BOP. Here is my modlist for my server.

Yeah, gone a bit offtopic...anyway! Could you try once with only BetterEnd installed?

This should have been solved in 1.4.1 patch. You shouldn't need to touch your level.dat anymore. Closing this, if you keep having problems with biomes not generating open a new issue