The rule for grading a Two-Team Parlay with a tie or cancel is below.
Ties, Cancelled or No Action Wagers in parlays:
A tie, cancel, or no action in a parlay of three or more teams means that the parlay will be recalculated, and reduced, based on the remaining legs that have action.
A tie, cancel or no action in a two-team parlay is paid as a straight play on the remaining game using the original risk amount to calculate the win amount.