When I save a Loan with 2 registers (2 diferent Catalog Numbers) in my invoice appears triplicates of the registers (3 lines of same register in same invoice). But, if I don´t save and execute my invoice (in interactions panel) with the same 2 registers (after save a group of 2 registers by search) all it´s fine, just appear a line of material for each register. On the same hand, if i save a group of 100 registers where there are 2 in loan, the report print the 98 lines of that are not in loan and more 6 lines of that 2 catalog numbers (3 repeated numbers of each one).

Any clue?? Thanks in advanced.