the only reason they “announce” the times two hours apart (7pm-9pm in same venue) is so viewers tune in so they can amp game up fir half hour- anyone who has watched postseason coll hoops knows that there is always 30 minutes between tip times of the next game no matter what time previous game ends. So when they say 7pm and 9pm it usually means 7pm and 9:30(depending on when first game ends).