Rudder

This is a bug report related to the following conversation in gitter.
https://gitter.im/normation/rudder?at=601835cc1ed88c58d81391ec

Rudder Version is 6.2.1

When i look at the details of a rule in the Rule Screen, several directives are shown as "skipped" under "Compliance by Directive". The problem is that these directives were not added to the rule.
This happens not only with one rule but with several.

For example, I have a rule that has only two directives "d1" and "d2". This rule is applied to the group of all VMs. When I then look at the "Compliance by Directive" section, Rudder shows me 31 other skipped directives "d3" - "d33" that I never added to the rule.

What I additionally do not understand. If I then hover with the mouse over the "skipped" tag, Rudder says:
"This directive is skipped, because it is overriden by an other one on that node"
"...on that Node" Which Node? I have only added groups.

Overall, I find it strange that at this place Directives are displayed as "skipped". Is this the way it should be?
I would only expect something like this in the rules overview of a single node.

EDIT: moreover, rules with skipped directives are duplicated in node compliance (from node screen).