Wrong numeration in LyX Subsubsection

Question

I'm typing my lecture notes in one big .lyx file, and I use numeration to keep stuff organised in the TOC:

• Numbered Sections for Lectures\Recitations\Tutorials
• Numbered Subsections for Lecture\Recitation\Tutorial parts (e.g. For search algorithms, to distinguish between BFS and DFS)
• Numbered Subsubsections for Lemmas, Theorems, Examples and the etc.

Since I wasn't doing that from the beginning, I've just finished converting what I've already typed, and all the numbers are correct. But, when I begin typing a new Section, when I don't have a Subsection in it, the numeration continues from the last Subsubsection instead of starting over. In other words, this is what happens:

End of Lecture 2:

3.3.5 Conclusion

Begining of Lecture 3:

4 Lecture number 03 - 07.11.2011

4.0.6 Lemma:

Screenshot:

How can it be solved, to output:

4.0.1 Lemma:

without adding Subsection between the Section and the Subsubsection? I've tried to do that, and it results:

4 Lecture number 03 - 07.11.2011

4.1 Dummytext

4.1.1 Lemma:

But it don't need the Subsection there...

Answer 1

Instead of adding a "Dummytext" subsection, you have to add the following ERT ("Evil Red Text", i.e., LaTeX code) at the same place in your document:

\setcounter{subsubsection}{0}

See Resetting theorem counters: \section and (missing) \subsection for some background information.