It looks like Sage responded to customer's who were complaining, "Currently, MAS 90 only allows one bin location per warehouse. Frequently businesses have more items than possible to store in one bin location, and distributing the items to multiple bin locations would simplify physical counts and picking orders."

Sage now has, "Multi-Bin Advanced Distribution" for the Sage MAS 90 and Sage MAS 200 applications developed by Sage Software. You can track multiple bin locations per item/warehouse, providing you details about the exact bin location, the amount available in each bin location, and the amount available for distribution – giving you control of your inventory at all times.

We don't even need it to be that extensive. We just need to be able to find our product. Currently with the limitation of only 1 picking sequence per item at only 4 characters, it's just not enough space to alert us to where to find the product. So, a solution could be to make the pick sequence field longer. Or another solution would be to have more than one pick sequence field available per item.