In the form we are currently using, we get two different sets of product numbers in the reports. First if we creacte a report 'monthly' 'sales by product', we get the numbers for oct. and nov. If we combine them, we get a DIFFERENT result than the report made by 'create a report' (last option on the reports page) and select on 'product'. We get different results for each product?! Although this should be the same...