Today I was analyzing a butterfly I opened weeks ago in the Mar1 cycle and noticed that the greeks were off. I discovered the cause was I imported the simulated trades for the butterfly into TOS yesterday and TOS selected the NEW Mar1 expiration that expires on Wednesday rather than the Mar1 expiration the trade was in. For example, if you import BUY +1 BUTTERFLY SPX 100 (Weeklys) MAR1 16 1920/1875/1800 PUT @5.45 LMT into TOS, the new Mar1 expiration will be selected. If you click the Mar1 16 drop-down for the simulated trade, two Mar1 16 entries are available. Having two expirations with the same label may cause confusion. Right now Mar1 16 and Mar2 16 are affected.