My mod_menu disappears before Menu2Panel becomes visible

Hi,
I have a 'regular' menu that I want to disappear when menu2panel shows up. The problem is that it disappears way before the page is narrow enough to show menu2panel, leaving no menu at all on devices like the iPad mini.
How do I control this behavior?
Thanks!

I discovered that another person on the forum has a similar issue. You proposed this fix:
a#mmenu {
display:block!important;
}

Still no go, unfortunately. Now the mobile menu appears and disappears at various widths, while the regular menu is still visible.

I am going to take the above fix out of my css.

I'd be ok with the mobile menu only showing on smaller devices, but I can't have the regular menu disappearing on iPad's.

I'd appreciate any help you can give.

Thanks!