Hey man,
Did you record the "hey" as another part or a separate track from your chorus vocals? If so I think that's why it doesn't fit into the mix very well. I listened to the Original (Beatles) and the "hey" flows a lot better into the chorus, the main reason being (I think) that it was recorded together and not separate. Your "hey" seems to be the same over and over, like a single part copied just before each run of the chorus.
Did you record the "hey" as another part or a separate track from your chorus vocals? If so I think that's why it doesn't fit into the mix very well. I listened to the Original (Beatles) and the "hey" flows a lot better into the chorus, the main reason being (I think) that it was recorded together and not separate. Your "hey" seems to be the same over and over, like a single part copied just before each run of the chorus.