Created attachment 124275 [details]
Outline_Level_CustomeStyle_Bug

Create a document with two custom styles (that inherit from nothing). Style CustomLevel1 and CustomLevel2.

In edit paragraph style -> outline & numbering, select numbering style "numbering 1" for both those new styles.
Now, for CustomLevel1, in style -> outline & numbering, select outline Level = 1.
For CustomLevel2 , in style -> outline & numbering, select outline Level = 2.

Add a line of each style.

Problem :

Even with specifying custom levels, at the end both the lines are level 1.
Of course, it remains possible to modify the level using the IncreaseIndent button of the interface, but the change is not saved in the style (it's just direct formating).

Normaly, applying the style CustomLevel2 should directly put the right level to the text.