multiple boxes , only ever stock one. advice?

hello, I’m new to Amazon when it comes to selling. I’ve run into an issue when ever I send in multiple boxes for example 2 boxes containing 24 items each 48 total, alll the same product same SKU the boxes track and get delivered properly and when recieved they only ever seen to take 24/48 the second box sits in limbo. I tried again sent two boxes they recieved 24 and the second box of 24 sit in limbo .

Is this typical? will they eventually get recieved and stocked ? I run out quickly but now having two full boxes just sitting there in recieved is a pain .