Just to be clear, I am only using one theme. I don’t know why or how the files from the other theme are being used in the checkout page, but the entire website is in the “Sheets” theme.
In the Design box, “Sheets” is set in all 5 fields for theme, and in the package field it is still set to “default”.
So, I didin’t change anything....
I didn’t modify any files. I wouldn’t know how to do so and I don’t know where I would find the checkout.xml file.... The only thing I did was unzip the files when I bought the theme and copy them into the “Sheets” folder in File Zilla.
Like I said, I don’t know much about the technical part of the whole thing.