If you're using 1.8 liteloader, you probably will have problems. If you want a 1.8 map, what I did was create the big things in 1.7.10 worldedit, labeled where I wanted 1.8 items, and updated the map when I was ready. If you're having problems with 1.7.10 liteloader, you should check your mods folder or search the internet for a similar bug fix. Hope this helped!