The postgrids I have work perfectly except when I resize to mobile view, and the except text gets cut off at the bottom between 767px and 450px. The girds look fine from about 450px to 275px but below this they start being cut off form the right.
I have tried changing the 'Grid Items Width' for mobile device and the grids only work (no cutting off) at all sizes below the min-width (of 320px) when set to 60%. But at 60% the grids are very small when moving through some of the sizes, e.g. 350px. I can't seem to win with it. Hope you are able to help.