Wizard19 I'm not sure I agree with some posters that the skills you mention are not bordering on year 2 work ...
Telling the time to 5 minute intervals is, even with the recent raising of standards, an end of year 2 target (it used to be year 3/4).
So is knowing the multiplication facts for 2, 5 and 10 times tables - as long as you do mean she knows the facts individually rather than can skip count her way to them, or simply recite a table.
Comparing and ordering numbers beyond 100 isn't an expected outcome until year 3 along with understanding place value of 3 digit numbers - although there is obviously a progression through years 1 - 3 not a sudden jump.
The first time I can find remainders mentioned in the new National Curriculum is in Year 5, although I'm not suggesting that's when children first come across them, I just can't find them mentioned before that.
mrz out of interest had your most able year 1s also learnt to tell the time to 5 minute intervals - were they equally able across all of the strands or particularly able with calculations?
Of course the skills you mention cover only part of the whole maths curriculum, but given that children are rarely equally strong across all of the maths strands there's no reason a child can't be well ahead in some areas whilst average or even behind in others.
I think the real issue here is that if your DD has taught herself to tell the time as you describe, she may be able to do a lot more with the right stimulation. Your concern is that she may not get that at school based on your previous DD's experience of year 2.
If I were you I'd be interested to see for myself how quickly your DD can pick up various maths skills. If you taught her column addition then presumably you do some work with her at home?
You can use the National Curriculum to guide you on which topics to focus on and also to help you ask pertinent questions when you speak to her teacher at parents evening. If she really loves maths then there are lots of free (and paid for) computer resources that will stimulate her if it turns out the school struggle to differentiate (some do, some are great at it).
The new National Curriculum (unlike the old one) is simpler for a parent to understand because expectations are set out by school year. It is therefore quite easy to see in which topics a child is behind, expected or ahead.
Well done to your DD - I think teaching yourself to tell the time at 5 years old is rather impressive myself 