Experimental topics list filter feature

Is there any way to use order:title in a way by incremental numbers?

E.g, we have numbered topic titles which we would like to sort accordingly:

1.1
1.2
...
1.9
1.10
1.11
1.12
...

But with order:title-asc filter we get

1.1
1.10
1.11
1.12
1.2
...
1.9

Any ideas for a workaround?