Lufadler

I've been having an issue for the past few weeks where if I log off while in the nether, the next time I log back in I'll be in the overworld, but at the same coordinates as I was in the nether. I've tried reuploading my nether World save but it still doesn't fix the issue. When I try to download the nether file (ie. world_nether) it also says "This world does not exist". Is there any way to fix this issue or is there anything the staff is already doing?

I'm trying to use a resource pack for some custom sounds and paintings for my server, but when I go into the server the paintings and sounds aren't changed. So I followed all the tutorial and everything and I'm prompted to download the resource pack when I go onto the server. But after the download screen reaches 100% it doesn't fade into the white loading screen, and the textures and sounds are still the original minecraft sounds. I've tried to find other similar issues but the solutions weren't really helpful. I do suspect that it might have something to do with all the other textures missing. Since I'm only changing paintings and some sounds, only those files are inside the resource pack, so there aren't any textures for blocks or mobs etc. I suspect that might be an issue, but it works perfectly fine in a singleplayer world, so I don't know if that is the issue and what can I do to resolve it?