FYI, if you are rolling down more than the put spread width, you are buying a condor, not a butterfly:
BTO 1 SPX 1130
STO 1 SPX 1140
STO 1 SPX 1150
BTC 1 SPX 1160
On the other hand, if you are rolling up your put spread, you are *selling* put condors/flys, not buying. Same for the call...