I had this problem on my Reflex Super Slam that I bought last year- the shelf is not flat but contoured, while the arrow holder that came with my rest was hard, flat plastic that wouldn't lay flat. Easy solution: you can buy foam versions of these arrow holders at most pro shops for about a buck or two. They are spongy and fit nicely in the divets of these type of shelves on bows. They stick just as well as the flat ones and do a good job holding your arrow.