Items which are hidden by filter won't be installed even if they are selected.
For example:
- Open Red Hat Central
- Click "Select All"
- Type into "Find" field "angular"
- The only one item are now displayed and button "Install/Update (1)" shows that only one item are selected to be installed which isn't true. All items are still selected though only one of them are shown.
- Click "Install/Update (1)" then you will see that only Angular is going to be installed.