iProcurement Requisition approval process

Employee A submitted a requisition for approval to Employee B.

Employee B requested more information for the requisition

The history shows Employee A has 'No action taken'

Then Employee A approved the requisition even though Employee A is a level 1 employee where user has no approval authority at that position nor in AME.

we are wondering why/how the history shows Employee A approved the requisition and what does it mean when it says 'no action taken'.