This line of thinking seems to imply that someone can receive half a sacrament. It doesn't make sense. 
A man is either a priest or he is not. He cannot be half priest half layman.
If he is a priest, than he has all the sacramental powers. He may need jurisdictional powers to hear confessions, to witness marriages, but regarding sacraments, any real priest is a full priest.
The emergency baptism administered by nurses was not re-done conditionally afterwards. Only the rest of the baptismal ceremonies were done.
I don't understand how holy orders would be different.
Holy Orders is special because there isn't just one form involved and then you have everything as with the other 6 sacraments.
There are many layers and three separate sacraments within it (diaconate, priesthood, and episcopate).
Each major order leaves a specific Sacramental mark making the recipient separate on a new level from the laity.
The powers of the Episcopate also have been called the "fullness of the priesthood" indicating that the powers of a normal priest are limited in some sacramental sense until he is consecrated.
(Only a Bishop can ordain and consecrate, but a priest can be given special orders and privileges to bestow Confirmation at least in the Eastern Rites.)