Error on landed cost allocation.

We did a cost allocation with no errors. Created a PO, then received. 3 Items at the PO and at the receipt. All 3 marked as track landed cost at item record.  At the receipt, added landed cost manually. And used the value allocation method. The GL Impact shows perfect, but the at each item, did not allocated correctly based on value. It did matched the total but for example, Item A, making calculations at excel, should allocate 35% and is allocating 30, Item b should allocate 72% and allocates 75%, and Item c, should allocate 3%, but is allocating 5%.

Anyone know if there is something else we should consider? It should allocate based on value, and the excel shows same data than the GL Impact, but is at the item level where the percentages are wrong.