Mismatch between ads and catalogs

Since there are days in which I don’t receive any ad or I see background images ads that are not supposed to appear in my region (and I don’t see those that are supposed to appear) I’m looking for all possible causes. I’ve noticed this:

Notice that Sampson codes and the internal catalog ID don’t match nor the region. How’s this possible? Is that because, for my OS, I’m using english as default language?

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