Just in case they can get you to foolishly buy the other one by showing you its popup first?

Hi, jplc2014! It did happen that the duplicate of the offer with incorrect pricing was shown in the game for a short period of time. The duplicate with an incorrect higher price was promptly removed. Sorry for the inconvenience!

@jplc2014 

This is not the first time it's happened.  And it was not promptly removed.  The duplicate was active the whole time.