susy-compass,susy-sass,susy,susy-next
Add the no-gutters keyword to your wide span. While wide tells it to add more space to the span width, it does not automatically remove the gutter output. @include span(1.75 wide of 9 no-gutters);...
compass-sass,susy-compass,susy-sass,susy,susy-next
Your layout settings are wrong, so your gutters are undefined and hence the null values you are getting. It's gutter-position: after, not gutter-position: right. (The valid settings are these). See it working here. (Spoiler alert, output for your code is .test { margin-right: 1.0989%; margin-bottom: 1.0989%; } .test2 { background:...