it's called regression to the mean when we are talking about a single team, not to be confused with the incorrect "law of averages", but of course you don't know WHEN something wil regress to the mean but you know it will.
What max is saying is and I don't mean to offend you max, is bollocks this just doesnt happen, day games whether they go over, under or sideways have no bearing on the probabilities of night games.