Generator and rear A/C

Thanks for the replies so far. To answer and clarify for the above questions and suggestions. It's only when I try to run both AC's at the same time. I made sure fridge was on gas and inverter/charger was not charging at the time. Clamped meter on main 30 amp lead and had 0 amp draw prior to checking. The week before I cleaned both coils on both units. With one AC running I'm drawing 13-14 amps after start up. Only 0.2 amp difference between units when running one at a time. Amps level off around 28 amps with both running and slowly creep up until breaker trips (5 minutes or so).
I'm also confused if the second leg of the gen powers the rear AC only why am I seeing the draw on the wire feeding the 30 amp main?