Data plotted when filtering

First of all, sorry if the question is far too obvious, but I am quite new with the software.

I have 3 identical column graphs, showing plan and actual. It is taking the data from a list where there is info for several items. Because of the item size, you can only see the plan and actual for one item. So far so good.

But, when I click on a filter and select one of the items, strangers things mode starts: one of the graphs shows that specific items, good! The next one, keep showing the total sum as a shadow, and the contribution of the selected one darker (this one I already know why), but the third one, still shows plan and actual of all items, as shadows, and the selected one in dark. But as I already said, the window only shows one item, so it shows only the first one and a scroll, so I have to scroll to show the selected item...

Why this different action between first and third? I know that the reason for second is that I didnt put the "items" on the axis. Thats ok. But the other ones are identical; one shows just the selected item, the other shows all of them in shadows except the selected one...

Thanks in advance!!