D&C 128

 The Prophet Joseph Smith taught new and interesting doctrine - 

"...as are the records on the earth in relation to your dead, which are truly made out, so also are the records in heaven. This, therefore, is the sealing and binding power, and, in one sense of the word, the keys of the kingdom, which consist in the key of knowledge."  (Doctrine and Covenants 128:14)

The sealing power binds that which is done on earth with priesthood keys to be bound in heaven!

"...for it is necessary in the ushering in of the dispensation of the fulness of times, which dispensation is now beginning to usher in, that a whole and complete and perfect union, and welding together of dispensations, and keys, and powers, and glories should take place, and be revealed from the days of Adam even to the present time. And not only this, but those things which never have been revealed from the foundation of the world, but have been kept hid from the wise and prudent, shall be revealed unto babes and sucklings in this, the dispensation of the fulness of times."  (Doctrine and Covenants 128:18)

Obviously, at this time, there were still things that are yet to be revealed in this last dispensation.