Matching Notation between staves...

I'm using my midi keyboard to enter notes onto Notion 3. I'm in the process of doing an SATB vocal arrangement. Only thing is, even though the parts play back and sound rhythmically correct, they will sometimes be notated differently between parts.
I assume this is due to the exacting nature of computers; any slight variation in note entry, though acceptable to the human ear, is being translated very strictly, causing technical differences between the parts.
Is there a way to easily bring everything rhythmically to the same note values, or do I have to go in and manually correct each one?
I assume this is due to the exacting nature of computers; any slight variation in note entry, though acceptable to the human ear, is being translated very strictly, causing technical differences between the parts.
Is there a way to easily bring everything rhythmically to the same note values, or do I have to go in and manually correct each one?