but this is none of my business

one, it does make sense, and two, how would you blame photoshop for a picture

The text is accurate. She didn't shift her support to the other side of marriage equality until a few years later, when it became clear it would be a linchpin topic.
.
https://www.washingtonpost.com/blogs/the-fix/wp/2013/03/18/how-hillary-clinton-evolved-on-gay-marriage
.
http://www.theatlantic.com/politics/archive/2014/06/hillary-clintons-gay-marriage-problem/372717/
. and in her own words
https://www.youtube.com/watch?v=6I1-r1YgK9I

She only changed to keep votes so she could keep her position. She supported "traditional" marriage because it was the leading popular opinion. If you watch how she does things, she only supports what has the most support. She has no actual moral or philosophical reason to oppose or support gays, it's all how much she wants to stay in office.

Pretty much all politicians.

This is correct ^.