Multi-level list problem at level 3
I'm attempting to create a list like this:
1 Level 1
1.1 Level 2
1.2 Level 2
1.3 Level 2
2 Level 1
2.1 Level 2
2.1.1 Level 3
2.1.2 Level 3
2.1.3 Level 3
However, this is happening:

Whatever I try, level 3 restarts at 1, so for example I get 1.1.1 instead of 2.2.1.
I'm using three numbered list paragraph styles as follows:

Level 1:

Level 2:

Level 3:

I'm utterly confused why this isn't working.
Can anyone suggest what's going wrong?
Thanks!
