The 7-level should have 7 levels for everything, so I think something must have gone wrong, maybe someone altered this file somehow?
All level contains all levels, so will always have this issue, and is not recommended.
It is best to avoid using this setting if you can, as it just causes the classifier to choose the top hit without considering its similarity to other hits.
Something is going wrong here and I do not believe it to be a QIIME 2 version issue; I suspect it is a database version or format issue.