If the 'second night' dump file is on airplane mode. then the drain is too high. Try a factory reset. If there is no improvement, you may have to clean flash the ROM. What is the age of the battery?You're totally right, the graph is not relevant, it was just to show the phone has trouble switching to deep sleep.
Anyway : last night I lost 13% in airplane mode, so here is the dump.
PS : I try to attach BBS dump but I don't see them in my posts ?
Here is a cloud link :