For anyone who needs to have these observers replaced. You can download MCedit2 and have them all replaced at once. It'll take quite some time, but it will be fixed.
Replace 218:8 with 218:0
Replace 218:9 with 218:1
Replace 218:10 with 218:2
Replace 218:11 with 218:3
Replace 218:12 with 218:4
Replace 218:13 with 218:5
Everything should now work as it should again.
PS: Don't forget to press the save button after doing the replace.