[Hextech crafting] Can we get multiple shards of the same item? and if so, does it unlock it?

by the way I have unlocked at least 50 boxes and I have yet to find Something else then champions or skin shards (or rare cristals) another bug feedback: between clicking on 'open' once and the second time (when the box floats in mid air), the little sfx sound will abruptly stop after around 5-7 sekkonds
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