Channel Sub

4 channel interfire amp powering 4 doors and one sub?

Sorry, could not figure out how to respond to the answer in my previous question.
(I did not wire in the amp), need a stereo connection if possible.
The interfire 4 RCA inputs are doing the following
1)left channel left doors
2)left channel right doors
3)right channel sub
4)right channel sub.

the outputs on the amp are
channel 1 and 2 bridged to the sub.

channels 3 and 4 are working the 4 doors (which are all getting only left channel).

Are these 4 RCA inputs the same type of signal or are two maybe a sub output of something?

Can I simply try to swap around the 4 RCA's to acheive a stereo sound?

Maybe I need some sleep but I just cannot process it.

Try to do the left channel with left doors, and right channel with right doors. I don't exactly see the problem, but maybe this will help. Also, taking a shot in the dark, check your balances and fade on your head unit make sure they are all centered.

Edit: And also, to respond with a statement, just hit the button that says "edit" And it will just add additional details

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