iA3 theme mobile menu help

I’m using the iA3 theme and would like help setting up how the menu options are displayed on mobile devices.
I only have an iphone for testing but cannot figure out how the nav links get translated there. Specifically, with respect to the two drop-down menus that appear when I visit the site with an iphone:
1. There is a “Home” link on the top menu that I would like to get rid of. I am not using it in my nav lists on the regular site at all so I can’t see why it’s being inserted in the mobile nav options.
2. I can’t see where in the template files I might be able to set how the links in the regular site’s nav menus are displayed in the mobile drop-down menus, or whether I could just have the mobile version display only one drop-down menu with all the links, for example, instead of two drop-down menus that split up the links in weird and illogical ways.

Unfortunately my site is under construction in maintenance mode so I can’t provide links to it, but hopefully someone who is expert with iA3 could help me out with some general pointers.
I am pretty fluent with html and css, and don’t know much php but am doing my best to edit it as needed using help pages etc.
Many thanks in advance if anyone can help with this.