Dale is right; here are the details from CA statutes:
Since 1872, CA law has told CA courts to assume the parties to contracts in CA are reasonable, not crazy. If the literal reading of the contract is crazy, the California Civil Code's rules for the Interpretation of Contracts tells its courts: ignore the crazy reading.
Here is what the statute says:
§ 1636 A contract must be so interpreted as to give effect to the mutual intention of the parties as it existed at the time of contracting, so far as the same is ascertainable and lawful.
To win under this section, you would need to claim that both you and the landlord intended that the landlord would pay the late fee. No judge would believe this.
§ 1637 For the purpose of ascertaining the intention of the parties to a contract, if otherwise doubtful, the rules given in this Chapter are to be applied.
To win under this section, you would need to claim that there is no doubt that both you and the landlord intended that the landlord would pay the late fee. Again, no judge would believe this.
§ 1638 The language of a contract is to govern its interpretation, if the language is clear and explicit, and does not involve an absurdity.
To win under this section, you would need to claim that it was reasonable that the landlord would pay the late fee. Again, no judge would believe this.
§ 1640 When, through fraud, mistake, or accident, a written contract fails to express the real intention of the parties, such intention is to be regarded, and the erroneous parts of the writing disregarded.
To win under this section, you would also need to claim that both you and the landlord really intended that the landlord would pay the late fee. Since no judge would believe this, any judge would rule that the wording was a mistake, and should be disregarded.
§ 1643 A contract must receive such an interpretation as will make it lawful, operative, definite, reasonable, and capable of being carried into effect, if it can be done without violating the intention of the parties.
Ditto.