Any way to correct the running total of shares?

[Graham P Davis]

GNUcash seems to think that adding 187 shares to the running total of
12,306 gives an answer of 13,481. I know it's over fifty years since I
went to school but surely the new maths hasn't gone that weird?

It seemed to get itself in a muddle because the shares were a stock
dividend and therefore zero-priced but I can't see why that should
matter. 

Is there a way to give GNUcash the equivalent of a whack over the
knuckles with a ruler and get it to have another go at getting the
right answer?  

-- 
Graham Davis, Bracknell, Berks.
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