@Mike ******
something is not right with that story. IF you had a OA visa that you got from your country before you came here, got stamped in for the first year, then exited/re-entered with new proof of a year mandatory insurance coverage before the VISA expired you would have gotten stamped in for a whole new year (or as long as your insurance was valid for up to a year)
Are you sure you were comin' back in before the visa itself expired? (The enter before or must be used by date on the PDF) and not before your entry stamp expired?
I messaged you about this comment too as I'd like to see the stamps and visa if possible