Am I expecting too much?

Yesterday evening I started to play the alphabet puzzle with Anirudh with the idea to teach him phonetics. But soon after I realised he doesn't know the sequence of the letters except in his ABCD song. I was kind of shocked. I had thought that he must have been taught this at his school in nursery but I'm so speechless.

He can recognise the letters but he just doesn't know which letter comes after what. He is 4 years young and I don't know what all he is supposed to know by this age.

When we didn't get into Pre0primary (earlier called as KG) after all the admissions chaos because firstly very few schools had opened up admissions for KG this year and those who did, were either too far away so we didn't rank up in the point system or secondly were the not so good schools that we preferred that he loose one year and do nursery again but in a good school. We had mulled a lot about him losing this one year but finally decided its for the better.

But yesterday I wondered its good that he didn't get into KG looking at his simple Alphabet knowledge.

I don't know for sure. I may be wrong and expecting too much but please do tell me what is the basic knowledge level expected out of a 4 year old with respect to simple alphabet learning skills.

And its not just the alphabet, its the numbers. He always fumbles up with his counting too. He always eats up 13 and 14. So if I ask him to recite the numbers after 10 he will go 11, 12, 15, 17, 18, 19 and after a bit of thought 20. He remembers to say 16 sometimes and sometimes that is also forgotten.

I guess I will have to work with him everyday on this just the way I did with the "Days in a week" practice. Its been a month since he remembers all the days in the correct sequence

But please do tell me what your 4 year olds know or rather what are they supposed to know by this age. Probably its my mistake for not practicing with him often. But I do need to know.