The problem was mods getting out of sync this time. Steam updates our clients automatically but this hosting service was not doing the same. I even have to explicitly request a server version update. That was the invalid server thing a few days ago. So I have changed hosting services again. This one should keep the server and mods in sync with Steam rather than me having to do it by hand and having things be down for hours.

So our mods are back to normal. The list in order once again is...

*draginwater.pak
*Immersive_Smelting.pak
*LTs_Compass.pak
*Pippi.pak
*TheAtaliMod.pak
*WoodChips.pak

You can also always check the mods and their order as you get into the game. When you highlight the server in the server selection list, its description will include the mods in their proper order.