Glad he's sleeping through hun. He'd probably got a bit OT & 1 long nap plus 2x 2 nap days may have helped him catch up.
His night is pretty short with the 2 naps though hun, that was only 10hrs last night. Great that he STTN, but my only worry is the night is so short he will struggle to last the distance til naptime. then you get caught back in the trap of needing 2 naps because his night was short, but because he had 2 naps he will do another short night IYSWIM?
I'd just try & be as consistent as you can, it will take him a wee bit of time to get used to the 1 nap, & offering 2 naps to keep ontop of OT is totally fine - I did it too. But you just need to be aware of what I mentioned above, as he catches up, b.c its easy to get caught. He is also heading right for some major developmental leaps, big WW at 17 months & the 18 month regression, so you might have a few bumps & blips over the next month or 2 with those.
Hang in there!x