Your 2 previous questions deal with the same subject, so the answer is only one.
In modern frameworks and templates menus are no longer assigned through modules, it is possible, but you have to assign the menu in the correct position. How to know the positions of a template? Go to: Extensions >> Templates >> Templates >> button Options (right corner) >> enable Preview Module positions >> Save & Close >> Click in Preview link (located after template name).
We use T3 and to assign menus we don't use module positions, you just have to Extesions >> Templates >> Styles >> Click in style name based in Lawstudio (Ex: Lawstudio - Default) >> Navigation tab >> In Menu field select your preferred menu >> Save >> Refresh your front page and Enjoy. Note you have to do the same in all template styles of lawstudio that you are using.