Sounds like a question for me and my magical Excel spreadsheet.
First, take a look at this thread http://www.galciv.com/forum.asp?BID=GF&id=186632
To make it short, your metaverse total is correct. But metaverse score is very sensitive about having a steady submission rate. Currently you have:
block 0: 0-30 days, no aging : 45 games
block 1: 31-60 days, 5% aging : 4 games
block 2: 61-90 days, 10% aging : 10 games
block 3: 91-120 days, 15% aging : 24 games
block 4: 121-150 days, 20% aging : 30 games
block 5: 151-220 days, 25% aging : 37 games
block 6: 220-290 days, 30% aging : 13 games
block 7: 291 and more days, 35% aging : 0 games
The lack of submission between 06/26/05 and 07/16/05 takes an heavy toll: you score will enjoy a nice rollercoaster effect. Sometimes you will get huge points for a 60K games and sometimes your metaverse score might drop.
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