These could be projections not cleaned off at the manufacturing plant and not spacers.The gap is less than 1/4". It could easily be caulked, but all the weight is resting on four short ribs. I'm just not comfortable with that. On linoleum, I imagine they would sink in let the rest of the base contact the floor. Unless there's a way to work down these ribs, I don't think I'll use this model (Kohler Cimarron).
A grinder with a masonary composite blade would make short work of the protrusions without causing trauma to the unit. It's like sanding the high spots off a piece of wood.I took that toilet back to the store. I looked at the same model in another store, it had two of the four ribs protruding below the base rim, and the other two flush. I thinks its mfg variance. I'm not opposed to working them down if theres a safe way to do it, but I don't know anything about that material.