May i know what is the format of the images, are they raw files.?
Also try with any other image which might be stored on your computer.
From my iphone and from my canon mark 3. I browsed in my computer and I didn't have any files that acted like that
when you took the picture did you changed the orientation of the phone itself.?
This has never happened before with the iphone. This only started happening when I updated my Lightroom version from 4 to this one.