Waterborne Finishes: Roller Application with Two-Person Crew - Staggering Out of a Room

Todd Schutte and Bob Mohr demonstrate staggering out of a room when applying a waterborne finish with a two-person crew.

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Hello, I'm applying Mega One on newly sanded floor using the method shown in video. Unfortunately I get dark lines left after pouring the product on the wet edge of the floor.
The floor hasn't dried yet. Can I expect the dark lines to dusappear after drying or after putting 2nd and 3rd coat?
I'm really puzzled why do I get the dark lines on white oak given the fact that I roll the product over the floor almost immediately - the poodle sits on the floor only seconds. In your demo video you don't get the dark lines even though you keep the poodles on the floor longer than I do.