I've had the same problem--seemingly randomly.
I sent a pic to a friend who works with graphics, and she said the distortion was 'reversed' when she swapped the vertical & horizontal dimensions. In other words, when the pic was compressed to fit MMS criteria, somehow the vertical & horizontal dimensions were swapped.
EDIT: the tech term for a pic's vertical and horizontal dimensions is 'aspect ratio'. "Maintaining aspect ratio" keeps the correct image appearance (versus looking squashed, like a fun-house mirror). So, my graphics friend was saying the aspect ratio was being flip-flopped, e.g. a 640x480 pic was being transformed into a 480x640 image.
It doesn't happen on every pic; most go through ok. I've tried to see if it was linked to
using a pic from "Pictures' vs 'Capture Photo', or taking a pic (or using a pic taken) in landscape vs portrait orientation. I have detected no pattern for why it happens, or doesn't happen.
I believe this is not so much a Centura issue, as an Android problem. There's a lot of net references to other Android phones having this problem, besides Centuras.