Guardianships created prior to January 1, 1988, and continuing in effect on January 1, 1988, are not terminated, even though the statute under which the appointment was made may be repealed by this chapter. Those guardianships continue in effect as they existed prior to this chapter with all of the powers and duties of the guardianship, except that the guardian previously appointed in addition will have the powers and duties of a guardian and a conservator under this chapter to the extent that the powers and duties under this chapter may be broader or more clearly expressed.