Sorry I was busy, only got around to reply now frown

Did you change the level name for all objects in the level too?

Stuff in Mods\%yourMod\Levels\%yourLevel%\Characters, Items, Terrain, Triggers, WallConstructions may have level names embedded in them.

Easiest way to replace that I know of:
  • Open file in LSTools
  • File -> Save as LSX ... -> save somewhere
  • Open LSX file with notepad++ -> Replace "%oldLevelName%" to "%newLevelName%" -> Save
  • LSTools: Open the replaced LSX -> File -> Save as LSB ... -> overwrite original .lsb file in the map folder
  • Repeat for all map .lsb files