With a 1:10 nap first up, he's maybe a little UT hence waking, so if you extend that first A time a little (eg. 10min), you may find he doesn't need resettling and can do 2hr thereafter. With 2 30min naps, he was OT at BT so that's the likely cause of the 8pm waking. Its possible the DF disrupted his sleep and caused some of the NWs as itwas shortly after resettled at 8pm.