The reason the autominer and peat engine share an ID is because they are from independent mods. Kentington and SirSengir are not required to make sure that they're not using the same ID as another mod, after all.
In general, it's not too difficult for the user to modify an item or block ID manually - if not in Rocket Science, then definitely in Forestry.
yupyupyup! Aka: This mod isn't the problem, it's ID Resolver.