why does master A2 appear to me instead of A1 after the loop? INDESIGN...

This is not part of the questioned problem. But I see the running headers are inside your borders. But running headers     and pge numbers must always be outside the page margins to avoid conflicts with the content.

Dzień dobry!
Jeśli dokument jest skonfigurowany tak, aby zawierał strony lewe i prawe, strony nadrzędne (wzorcowe) również muszą być lewe i prawe.
Jeśli chcesz obrócić 5 stron, nie jest to liczba parzysta oparta na 2 stronach. InDesign nie może operować (przetasowywać) tego w obie strony.
Możesz spróbować ustawić C Master tak, aby był oparty na dwóch stronach zamiast na 1. Lub, co bardziej prawdopodobne, możesz skonfigurować dokument i wszystkie strony nadrzędne/wzorcowe w oparciu o pojedyncze strony.

Good morning!
If a document is setup to be left and right hand pages, then the parent (master) pages must also be left and right handed.
If you want a rotation of 5 pages, that is not an even number based on 2 pages. InDesign cannot operate (shuffle) it both ways.
You could try to set the C Master to be based on two-pages instead of 1. Or, more likely, you could make the document setup and all the parent/master pages based on single pages.

why does master A2 appear to me instead of A1 after the loop? The masters look like this AA BB C and loop . C
So A1A2 B1B2 C1A1 this is how it should look like and in my case it is A1A2 B1B2 C1A2 , why A2? how to change it

this is a notebook for 200 pages , 5 pages are 5 masters and there is supposed to be a repetition of pages , only as I wrote I do not understand why in my case is after C the second page of master A and not the first one