Comment 10 for bug 1806385

No, you can easily tell where the new slide is created, simply by tying defferent text into the existing slides (suggestion: Type "1" into slide 1, "2" into slide 2, etc.). If you do so, you will find that as soon as the existing slides fill the side bar, the new slide will be created at an unexpected position.

I just tested it again (Version: 6.3.3.2.0+), and new slides consistently appear at position #8 (although I have more than 10 slides). That's definitiely the wrong place. Try it.