The map origin is the top left corner, so adding anything to the top or left side will move the rest of the map. If you're using renewed, you can use a datapack to set a custom offset to keep spawn in the same location, or move it to an entirely new location of your choosing.
Does it work if you remove Optifine?
Since NPCs and other mobs have not been added yet, I would assume Mevans is waiting on those before he adds proper mob spawning for biomes.
The old style of custom waypoints doesn't exist in renewed.
Please post the full crash report.
That is the intended behavior. You can change your computer's date or wait until the date changes on its own if you do not like these amazing features!
Optifine is available as a forge mod, just download it and put it in your mods folder. For most players, it works fine, but for some it causes issues. Some shaders may not work well with the Mod mostly due to the doubled day/night cycle.
Check your "/spawnDamping" settings.
We managed to get it fixed temporarily until more players joined the server, which then more npcs will just disappear.
This sounds like one, or a few, players have excessive amounts of NPCs in their vicinity and are taking up the mob cap.
When I delete these mods, if I reinstall them will my items or blocks be saved?
Any blocks/items/entities from those mods will be removed. That is why you need to make a backup.
That is very strange that it does not crash when they are in your inventory. Maybe a mod like Storage Drawers would provide a storage solution that doesn't crash?
Since it is a render issue and you have Optifine and it shows up in the stack trace, I would first remove Optifine and check if it still crashes.
If it continues to crash, (make a backup or your world, mods, config, etc. before you do this) remove all mods except thaumcraft and its dependencies. If it still crashes, then you can report the issue to the Thaumcraft devs. If it stops crashing then, there is probably an incompatibility between some of your mods.
Then you are most likely playing on a vanilla server. Install forge and the LOTR mod to the server as well.
The other possibility is that you aren't aware you need to install the LOTR mod on your client.
Make sure all players have valid Minecraft accounts and are playing in online mode. If that still does not work, you may need to setup a local server instead of using LAN.
I don't think so.
I haven't heard of that command before. Is it added by a mod, and if so which mod?
That processor is really slow and that is a very small amount of RAM. I'm honestly surprised you got the mod to run at all, even if on an older version. I think if you want a playable experience with the newest mod version, you'll have to get a new computer. A modern laptop for around $400-500 would perform way better than what you have now. If that amount of money is not an option, you could check if your current laptop has user upgradable RAM. If it does, you could get an 8 GB stick for around $30. (I tried to make sure that 8 GB stick is compatible, but please double check before purchasing)
Generally lag would be caused by a slow CPU, or just asking for too much even with a fast CPU.
A lack of RAM would usually just cause the game to crash.
I think the best idea would be for you to tell us what specs your computer has and that will tell us if it should be able to run the mod and at what settings. In windows 10, you can find this by searching "system information" in the search bar. I'm mainly interested in the Processor you have and the Installed Physical Memory. If you're on a different operating system, you can just google how to find out what specs it is.
"the ME dimension takes up most of the mod and is responsible for the majority of the lag"
The dimension itself shouldn't cause any lag when you are in the overworld. If you're referring to all the things in the mod that are only accessible through the dimension (or creative) such as NPCs, scructures, and game mechanics, then that may be the cause of some RAM usage. However, most of the RAM will be used for textures of blocks, items, and entities, as well as the world you are in.
TL;DR: No you can't remove the dimension, nor would it help significantly if you could. Best course of action is to provide your specs.
Also, please be aware that the mod changes food to last twice as long as normal. If you do not want these changes, you can disable them in the config. I think it's called "hunger changes" or something like that.
You can find it on the Servers page.
It is a very large mod and takes a while to load, especially on slower hardware. The recommended RAM amount is 2 GB. Make sure you allocate at least that much. If you have plenty to spare, you could allocate 4 GB and that should help it load slightly faster.
The top of Erebor (near the center of the biome) should be over Y-level 200 (around 240 if I'm remembering right). Minecraft has a maximum height limit of 255 so it's not possible to make it much taller.
If your Erebor is nothing like this, then I would first suggest creating a new world and see if the same issue occurs there. If it does, then I would go to the main page of this wiki and download the latest 1.7.10 version of the mod. Use that version and let us know if you still have the issue.
Just zip up your world and upload it to a file sharing site like mediafire, dropbox, etc.
Then post the download link here.