"Paste" with poly titles

myLabel <- paste(PctShp$PCT, PctShp$Last_Name, sep = "\n", collapse = NULL)

GIVEN
PCT = "1234"
Last_name = "Open Seat"

EXPECTED BEHAVIOUR
1234
Open Seat

ACTUAL BEHAVIOUR Prints on maps like below.
1234

Open Seat


I suspect I do not know something important about "Paste"

All criticism and comments appreciated,
Jim Burke