It says untreated hypertension should be graded P8, which it was at the time. However now it has been succesfully treated. Would you say that it will be okay then? it doesnt say anything about if it has been treated.
Try writing to the MO at your nearest AFCO/ACIO, ask your questions, put it in an envelope marked 'Medical - in confidence', and stick this in another letter to the recruiting office, asking them if they can pass it to the MO.
The recruiters can't answer medical questions, but that is the advice they've given in the past.