My friend was called in for a meeting with the teacher and a member of SLT who was there to guide the teacher on how to approach it because she was an NQT. This was outside the remit of a parent's evening so it can be useful to have an experienced member of staff to guide and interject if needed.
I volunteered in the primary for 15 years. Your DD taking work twice is not a reflection on your parenting and won't be seen by school as such. They just want you to maybe talk through scenarios of good choices and try to always frame it in a positive way, ie what would be the good choice to make. It is the same with books you read with her and to her, talk about the characters, talk about good friendships, kind behaviour etc.
Children are taught right from wrong it does not mean they are angels all the way through to year 6. They mess up because they are children. It is to be expected. In the kindest way possible the way a child is in school may be completely different than they are at home. They are one of thirty children in the class with lots of different personalities and they might respond differently to them.
It is also normal to be given 3 things to work towards too for every child. Mine were given 3 and could choose 2 of them, these were ticked by the teacher and handed to us so we could see what they needed to work on.
It could just be with your daughter that her confidence has been knocked a bit by her claiming other children's work, not just because she was found out by the teacher but also it could be that children sitting next to her are worried about her taking their work. This can be displayed as using their non-writing arm to protect their work.
The whole Foundation years and KS1 is a frenetic environment and honestly if you were to be an observer for a day you would see that children do struggle to sit and work at things. It is something they learn. The whole class moves, they never sit still in their seats, play with their hair, look out the window, watch the child next to them play with their shoes. They are little and have to learn what school is and how to fit into it as best they can. I much prefer KS2.