Interesting..I've also had some problems with span (not) pricing a spread..the bid/ask are a bit crazy esp after hrs.
So now the Oct. 24 spread looks like +1 1850/-2 1830/+1 1810/-1 1800/+1 1790 (puts) for a credit of 2pts or 100 gross (with gain on call and loss on 1800P). Comms are 1.41 per trip, but I traded the Oct. 17 1840P several times. (+1.50) It all adds up. 34 x 1.41 = 47.94 costs for both spreads (so far).
FYI, I also have an elaborate spread on CL. Made some money on the entries, but lost it all back on the net pos. which was 91/90/89 short put fly. I had my chances as it hung around 90 for a while. Mostly reversals and now some boxes, short term directional trades. Gotta watch pin risk with so many strikes. Completely hedged neutral, except the lottery ticket bullish short fly. The highest put strike I sold was the 93.5 for 1100. At 80, the thing was worth at least 13500. Looking forward to Nov. expiry and be rid of it all. Looking for some point to get long the stock market, but don't see anything, yet.
Got the 81/83 CL box. The result of 2 dir. trades conversion/reversal. Gotta watch that the rest of the day for pin risk. I don't want any uncertainty.