When playing with Improved Mutations the added mutations are removed from the list. This is caused by Improved Mutations deleting and re-writing the entire mutation list, instead of just the items being changed. Current workaround is to manually add the mutations to C:\Program Files (x86)\Steam\steamapps\workshop\content\333640\1207623704\Mutations.xml from C:\Program Files (x86)\Steam\steamapps\workshop\content\333640\1370689349\Mutations.xml
When playing with Improved Mutations the added mutations are removed from the list. This is caused by Improved Mutations deleting and re-writing the entire mutation list, instead of just the items being changed. Current workaround is to manually add the mutations to C:\Program Files (x86)\Steam\steamapps\workshop\content\333640\1207623704\Mutations.xml from C:\Program Files (x86)\Steam\steamapps\workshop\content\333640\1370689349\Mutations.xml