They do match the curriculum.
Whizz covers topics that quite often get missed or rushed at school. A,lot,of,children are capable of working at a maths level higher than their age, and it could be there are a group of children who are good at maths.
One thing I would say apart from I do think Whizz is an excellent programme, that because it is computer based, children don't always understand how to translate that knowledge on paper because school tests are worded differently. This is why paper based exercises are just as important.
I wouldn't focus too much on the maths age.it isn't important. What is more important is to redo lessons to improve times and do the revisions to ensure she fully understands all the concepts. Whilst it is great to rush ahead,o a lot of,this knowledge will be forgotten because she won't/might not do it at school for a long time.
Talk to,her teacher about her strengths and weaknesses. What issue good,bad at at,school and does this reflect on whizz.