Thanks for posting and sorry to hear that things aren’t working as expected.
What make/model device are you viewing this on and with what browser (incl. version number)?
Edited to add that I tried to reproduce based on the information available so far, but I wasn’t able to do so. I tried to roughly reproduce the layout based on the screenshot and the information about using a 50px base tile size and 5px gutter size.
My suspicion is that there’s either something unique about the Theme / Styles, dashboard layout, device, browser, or some combination of the above that’s causing the oddity.