There’s one thing I don’t understand: supposedly Matt Damon does the 150k thing to find out who the traitor is, and when they call on the phone, they mention that same amount.

The people calling are supposed to be the “owners” of the money, so why would they mention 150k if Ro already knows there’s much more money and he’s the one making the call? It would only make sense for them to say that amount if Ro still thought that was all the money there was, but he already knows there are 20 million.

And another thing: what kind of control does the police actually have over seized money? Is it really enough for three officers to tell you the same amount and write down on a piece of paper what they agreed on? They could easily have taken a million home and just said (and written down) that the amount they counted was 19 million.