Get rid of little glitch on Instagram picture?

I've recently purchased a brand new phone (iPhone 6S) I posted a picture on my Instagram account, and a small square glitch appeared on the photo. It was only tiny, but it will not go away. I've deleted and redownloaded the app, I've restarted my phone! It only happens on this device!

This makes no sense

  • Why do my Instagram videos glitch? Sometimes when I watch videos on Instagram they won't play all the way through and will glitch like the above picture. I have an iphone 5 and I don't understand why I'm having this problem!
  • Which picture edit app (for the iPhone) do you use to naturally remove any human being? He photobombed himself in my picture? I went to Disneyland yesterday and I can see my friend photobombed himself in my multiple pictures. I still have them on my phone. Does anybody have any recommendations (ideas) for any picture edit app I can use to edit him out? He's standing on the right side of me. (which I can see he ruined the moment for me.) P.S. Yes, I like to take pictures with other cosplayers.
  • What can fix this Instagram glitch? I'm trying to follow my cousin on Instagram but when I type in his username it doesn't show up. Then when I go to my other cousins photos in a picture he is tagged in I can see his username. I click on his name and I click follow it says following then almost immediately it goes back to follow. I have restarted my iPhone re installed Instagram and logged out and back in. Oh and my cousin has over 4500 people following him could that have any affect on it?
  • Picture editing experts: How do I edit a picture like this? I'm looking for a program or editing software (or iPhone app) to edit a picture like these two. And if you guys do know the program, do you also know what individual settings it takes to edit like this? Like sharpness, etc.