Description:
I want to edit the style of a slide, in particular the appearence of one of its levels. When I move from a level to another one, the previous level selected stays selected.
In the attached images it is visually reported what happens.

Steps to Reproduce:
1. Open Impress in LibO 6.4.0.3 64bit (no idea for 32bit)
2. Open Impress and load a template
3. Create a slide
3. Try to modify the style of some part of this slide
4. To do this, right click the mouse selecting a certain point of the slide.
5. From the context menu select "Edit Style..."
6. Select the "Customize" tab
7. Select Level1 (see attachment, Bug1.png) => This is OK.
8. Now decide to move to Level2 instead of 1. When you select Level2 the Level1 stays selected (see attachment, Bug2.png)
9. To test if this is just for this combination of Levels, I tried to select Level3. In this case Level1 becomes unselected but both Level2 and Level3 are selected (see attachment, Bug3.png)
9. For investigating if this happens only when you select consecutive Levels, I tried to select Level10. At this point Level2 becomes unselected, while Level3 and 10 are selected (See Attachment, Bug4.png).

Actual Results:
So two levels are selected at the same time if you change idea and tried to modify another Level instead of the first one you selected.

Expected Results:
Only one selection at a time should be selected, unless one presses also CTRL or Shift key.


Reproducible: Always


User Profile Reset: No


OpenGL enabled: Yes

Additional Info:
No idea of what happens with other versions of LibreOffice. I never used Impress before yesterday.

Regards,
Topoldo