Oshanie - I have found with two bubs that they did the sleeping through at 3-4 months and at 4.5 months (to now) my dd is waking 2-3 times during the night, no matter how much she feeds or sleeps during the day so I think it is normal for a number of babies.

You could try changing the waking time, but be prepared it may not work, and that you would have to continue it for a few days to make it a new habit which could be tough with him still going to sleep late and you getting him up earlier.

You could just wait it out a bit longer and see if he changes his pattern by himself - they seem to change what they are doing week to week to me.

I'm not much help, but sending you lots of support and best wishes that you find what works for you and bubs.