Well paper 2 has more marks so it makes sense she got more marks on that as a total. I would say it wouldn't hurt to look but sometimes people are just better at one part.
The questions are different, the focus and the inserts are different as well, as will the creative writing or letter/formal writing tasks across both. So she may just be more suited to, done more practice in-class and at home of the paper 2 stuff compared to paper 1. Sometimes people are just like that and it balances out overall.
Also the way it works now is, a different examiner normally marks only 1 of their questions. So one examiner will do hundreds of Q4s, another one Q3, etc. So actually a paper will be marked by a few different people, who have been marking that question loads and know what the mark scheme is by the back of their hands. It doesnt mean mistakes wont be made, but it reduces the likelihood. There's no harm in getting the teacher to have a look, though.
Just that especially in subjects like history, Sociology, psychology, English - the papers tend to be different topics, so a student may prefer some speicifc topics and so revise them more or just be naturally more inclined that way. So it's slightly different to maths, where they try and mix loads of different topics for all the papers, so a vastly different mark there is weirder.