For the night feed, my boy also have it when he was about 5month.
Since i need to work, porpor feeds him using bottle. Once we found he need to have night feed again, I've asked porpor to feed him 0.5oz more on each day feed. After that, he doesn't need to have night feed anymore.
Btw, you need to make sure he's very full in the last feed before going to bed. When you are sure the mid-night wakeup is not due to hunger, it's easier to handle the wakeup (other reason of wakeup which is not due to hunger).