Label printing problem

Every time the material is released from QA, lables are printed for that material in the quantity determined by the GR slipno. in the material master.

Now sometimes, it shows the SAP print spool of the zebra printer with the right quantity but prints much more than that.

Like if in the spool it shows 193, it actually printed 300 until the printer was out of paper.

I am trying to find the reason for two days but have no clue. Its very frustrating.

I was looking at the form which i developed and the print program but could not find anything.

The real problem is that how can the no. of pages different from the spool.

And there is only one output request / spool request.

Has anyone came across the same situation ?