In CS you know there are items further down the list because there is an arrow in the lower right corner.

In inventory, I had no idea that there was more further down my list. I had over 100 items and couldn't join maps but the only items I could liquidate were the good ones. Finally I figured out to click-and-hold an item in the list and move the mouse upward.

Now, on my iPad, I would have just done that without thinking, but on Chrome it doesn't occur to me.

Additionally, I was just told that there are more than four costumes. Think of the plat I could have spent these last four days if I knew there were more costumes further down the list.