Some Widgets are so called Multiwidgets. These widgets show multiple data fields at once (e.g. analog revolution and the current gear). The free version allows three widgets per game.
A multiwidget counts multiple times, because of its additional features. If you added a multiwidget with 2 features in the free version only one additional widget can be added to the page.
The Multiwidgets are marked with a small green indicator. It shows the maximum count which this widget can consume.
Some Multiwidgets have a dynamic count, which depends on the number of activated features.
The counter on the shown screen shows the actual required Widget count.