Bracket order for calendar spread in TWS (Interactive Brokers)

Michael B

Could anybody please advise if this bracketed order does what I think it does?
I would like to buy the calendar spread for $8 debit.
If it's filled and later on it goes my way, close (sell) for $9 credit => $100 profit
If it goes against me, close (sell) for $7 credit => $100 loss


I know this works for a one leg trade, but I am not sure a combo will behave the same.
I also don't know what the column Aux Px means. If I change the STP cell from 7.00to a different value, the corresponding cell in the Aux Px column will change too and viceversa.
Thank you.