License calculation in the product usage doesn't check quantity information from license (AOS-59663)
This is a software bug. The bug AOS-59663 has been published in the Apstra 6.1.0 release notes:
The Platform -> Product Usage page does not take into account the quantity field in each license. It simply counts the number of licenses. Product Usage erroneously displays insufficient license warnings even though a license with multiple quantities is applied correctly since it is seen as a single license. Apstra operation would remain unaffected even if there were product usage warnings.
The bug should be addressed in the future GA release.