However, what I meant was that you seek one set of information vide one application. i.e. you file one application seeking information and guidelines on upkeep of records, period of storage, disposal etc. In another application, seek information on the year wise assignment of duties who are responsible for the safety of the records etc. Vide the next application, quoting the PIO's reply "that he has to get written instructions from the appropriate authorities." you can ask for the copy of the rules vide which the PIO has made the statements and/or the clause in the RTI Act which directs the PIO to get the "written instruction" etc.
In short it would be nothing by an exercise to gather information on the erring employees of that particular PA & not just the PIO. This is something like what you read in the spy fiction. At the end of the exercise, you will have enough data to give you the correct picture and come to your conclusion of what ever was your original object at the time of filing the initial RTI Application.
One must always remember that the object of the RTI Act is to gain information on the working of the Government machinery. It allows the citizen to make sure that the employees are working properly and equal participation of the citizens in the working not just grievances redressal or attempt to expose corruption.