Lifetime 3-piece Shelf Accessory Kit For Garden Shed

[This review was collected as part of a promotion.] I purchased this product 60404 for use with shed model 8'x5' 60392 based on the Lifetime website accessories information . When building the 60392 shed, the instructions have you install the metal rails for support and for shelving on each wall panel in a specific spot. As as result, the only place to install the 3 shelves is directly in the middle of the back wall, since the other two walls only have one rail for shelve hardware to attach. When I attempted to install the shelves, the shelves are too short in length to use where the rails are located. I went back and double checked the shed instructions and the metal rails are in the correct spot. I looks like the rails could be moved so we moved one rail to the next ridge to close the gap of approximately 1". We hope this is okay since the shelves would not work otherwise. Can we move the rails to accommodate where I want shelves?