A few other owners have had the bed frame come apart, but more frequently the plywood bottom will sag. So, if you are going to fix it yourself, you might want to consider extra support for the plywood. Some floor plans have a second 1/2 bath, and so the extra black and grey tank lights on the monitor panel may be there to cover multiple floor plans. Regarding the additional sewer outlet, sometimes distance between tanks is too great and hence the second outlet behind the axles. Yet plenty of owners have connected the tanks together with small diameter rigid or flex line to equalize levels. And there is even the possibility that CR added one or two tanks, valves and the sewer outlet to your unit by mistake. You should be able to feel the sewer line thru the underbelly fabric, follow it and verify that one or two additional tanks are installed.
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK