This is a glitch in the game which appeared after an update some months ago and it has never been fixed. It's a real pain and I often end up getting items I have not bought.
Rynetory2, to be clear here about what is happening.....
The newspaper refreshes every 5 minutes.
When the new items appear at the refresh, occasionally (I estimate 25% of the time) the newspaper will refresh again a second or two later.
So as you tap on an item which has just appeared to buy it, you end up buying something else as the newspaper refreshes again when it shouldn't.
It would be very good is they could fix this glitch