Changing number bullet point levels

Hi there. I am formatting a document and need to have several numbered levels eg. 1, 1.1, 1.2

This is how far I have got: 1, next level * (normal round bullet point). I have then changed and gone back and started the next sentance with a 2. I have several levels that need to appear under 2 being 2.1, 2.2, etc. However, when i change the level to 2 and indent the next sentance to a bullet point it becomes 1.1 and not 2.1! I have tried everything - changing list level, define new number format and setting number value. Anything that something might be hiding in!

This is what I am trying to do:
1.
* (normal round bullet point)
* (as above)
* (as above)
2.
2.1
2.2

This is what it presently looks like:
1.
* (normal round bullet point)
* (as above)
* (as above)
2.
1.1
1.2

Thanks and kind regards
Charlotte