Context: I sent one of my articles to a friend of mine a week ago and yesterday I resent it with some corrections. So, today I am talking to my friend on the phone and ask:

1 - Did you notice that I changed some passages in my article?

2 - Did you notice that I had changed some passages in my article?

Which tense is appropriate in this context?

I see them this way:

1a - Did you notice (when you were reading the article) that I changed some passages in my article?

2a - Did you notice (when you were reading the article) that I had changed some passages in my article?

Which makes 2 more logical. But I am not a native speaker.
What do you think on the matter of the question?