Offset on tablet when stacking col's

Created by: timalbert

I am running into a problem on the tablet where .col-offset-* does not stack. It instead adds the offset where I presume it should not. Should the .min-width be lower than what it is currently? It looks like it needs (@screen-tablet - 1). Currently it is:

@media (min-width: @screen-tablet) {
  .col-offset-1  { margin-left: percentage((1 / @grid-columns)); }
}

Screenshot of my issue: