I guess going into more detail would clarify some things here.
Let's do an example, for the /CL trading at 50, the 50 put trading at 0.75 and the 51 call trading at 0.30
1) You have /CL and buy a the 50 put.
Since you incurred a 0.75 debit for buying the put, if CL goes to 51 you only make...