That is correct, I can actually fit both my son's and my BMX (race not trick) bikes or out two 27.5 mountain bikes. But he cannot ride in the front seat due to his age I was obligated to get the rack plus my second son's bmx is in the trunkIf you fold down the seats and take off the bike front wheel, then I think two bikes will fit inside the Soul. No rack needed.
I've done the same. Yes, a little heavy in rear but nothing terrible. This solution works better for me / my wife as getting the kayak on the roof was problematic, so we went with a hitch solution.I got a hitch and a Curt 4 bike rack. Only ride in town, feels very heavy in the rear.