I am looking for all Tasks that have a due date "before the end of next month". During the Previous shows me all tasks that have a Due Date during the previous day/week/month but excludes tasks that have a due date in the future. This Month or Next Month shows me all Tasks that have a due date this month or next month, but excludes tasks that have a due date prior to that.
To add context, I am filtering for all Tasks of mine that are incomplete that have a Due Date before or up to the end of next month.