Same here ... yesterday's chart shows 01.75 close, today it says settlement was 06.75. There's often a discrepency of a couple ticks or so, but these #'s are vastly different.
I have always found it to be very interesting that people trade futures contracts without bothering to read the contract specifications. "Special Fair Value (FV) stock index settlement procedures are applied on a monthly basis. Specifically, domestic stock index futures and options contracts are settled to an adjusted price per Rule 813.D that reflects their "fair value,â i.e., by reference to the closing cash index value plus finance charges less anticipated dividends." Full details at: http://www.cmegroup.com/trading/equity-index/fairvaluefaq.html