I'm not an expert, but after some investigation I believe this is some simple/careless image stiching error. I had a look at some of the Hirise images of the area in full resolution and in 3d, and it is very rough terrain as you can see in this anaglyph example:
I suspect they used images (and color) shot from different directions overlayed with overlap on a terrain model with lower resolution creating these weird effects showing multiple distorted images of the same objects.
However, in the process, I noted some other interesting shapes with e.g. multiple squares of the same size in the area in question. It is not visible at the jpl/gale crater site, you must look at hires images. It is barely visible in google earth, but best viewed in e.g. Hiview.
With equally sized but rotated rectacles to mark some of the squares:
Seems like the area is made up of some sort of regularly spaced cracks to create these rectangular pits.