Just compare these two scenarios, listed are the mafias for each game (completely hypothetical)
a) M1: You, Echo | M2: You, Echo
b) M1: You, Echo | M2: adam, SFG
Do the calculations, the probabilities of a) and b) happening are exactly the same, no matter which pair you come up with for M2 in the b) scenario.
Going back to the dice roll example: if you roll a dice three times, the probability of rolling 4,1,2 (in order) is exactly the same as rolling 3,3,3 no matter which way you look at it. Seeing as our role assignments are random, this pretty much
is a dice roll, so by your logic you are saying that if a die rolls a 3, then the die is less likely to roll a 3 on the next roll.
And yes this
does matter, because you are using this "logic" to say you and Echo and very likely not to be Mafia, when you have statistically the exact same probability as any other pair.
What you are saying is listed in MafiaScum as
Gambler's Fallacy.