Please concentrate on issue, once it’s being solved, you could raise the other one, First of all you’re working with sentinel 2, and you have many different dates tiles, as you mentioned in here,
For free clouds image you need at very first step to apply Atmospheric Corrections (AC) using Sen2cor,
However for those are subjected to could cover, the only thing you should apply is idpex,
Please take a look at the following post,
I suggest to you also to take a look at the entire thread, it already includes the previous post of Idipex,
Coming back to your xml file,
This should work as you said, after deleting the .1 and edited the PorductSetReader,