[Landlord-FL] rider for not signing renewal before the lease expiration

Management company I use does not have stipulation to change the rate if the renter has not signed by the expiration date. Just stated that the signee needs to give 30 days notice of not they own a full months rent. Last year the tenant didn’t return it for 1.5 months and when I question the management company they said it converts to month to month until they sign. Is this common? I would have expected the month to month to be an increased amount.