Question on bucketing scale points in Cross tabs

Hi. I have a quick question I couldn't find an answer for anywhere. I'm working on setting up some crosstabs. We use a 6-point agree scale for a lot of our questions, and we typically bucket them into top 2, bottom 2, and then the codes 3 and 4 are separate. I've figured that out and it's working well. The issue is that every now and then we use a 7-point scale, with code being a Not Applicable, Don't Know, etc. We always exclude them before we bucket so the responses can be based to those who are aware, know, etc. However, when I click on exclude, and then go to the Bucketing section, it still makes me group that code 7. Does anyone know if there's a way to exclude that code 7 when I bucket? Thank you!