I have tested and this does NOT occur in the Firefox and Chrome browsers on my Android tablet.
However, when viewing the site using the default web browser in Android KitKat on my Galaxy Tab 4, ALL thumbnails are displaying off center, so that the upper left corner of the thumbnail is in the center of where it Should be, and there is a great deal of messy overlap with text and buttons. I have been viewing the site on this browser for weeks now, and this issue only just came up in the past few days.
I just thought you should know.