Issue with Tab hiding and tab merging

Hi experts

For transaction IW33, In operation tab when I double click on item number, then it takes me to another screen.

So here I hide all the tabs except service tab for Item category "N".

But when I again going back to that screen for Item category "L" a tab appears which I already hidden.

But When I look in "Define Tab container properties" windows, the visible field is unchecked ,then also the tab is visible.

Please to sort it out .

The component tab as shown below is hidden in properties window, then also it is appearing.(Transaction IW33, Under operations tab, double click on one item).