That's 4 shares, not 4 times. Devcoin blocks are 50k. Minus mining 10% is 45k. For that round one share = 180m/1588 = 113,350. So over the period of payout you'll get 4 * 113.35k (the 453.8k you reference) total paid out in denominations of 45k (mostly 45k, there may also be smaller denominations as required to split blocks between recipients).

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ah okay. because i expected the 113.35k on that block ^^'