It only seems like a disconnect if you assume that our psychologies and sexualities are ALWAYS in synch. They're not. lsmentor.com had a great free article about this.
Pick your lingo: Dom/sub, Top/bottom, Alpha/beta, etc.
Think of it as two parallel lines or spectrums, one above the other: On the far left "Dominant" Psychology and "Top" sexuality. On the far right "submissive" psychology and "bottom" sexuality. Straight down the middle "Switch": Could go either way. I'll use the labels "Dom/sub" to contrast the extremes on the emotional & psychological spectrum and the labels "Top/bottom" for the extremes on the physical/sexual spectrum.
Everyone's psychological/emotional needs will fall somewhere on the "Dom/sub" spectum. Their physical/sexual needs will fall somewhere on the "Top/bottom" spectrum.
It's perfectly natural to have a "Dominant" psychology and be in control professionally, personally and generally lead in your friendships and relationship yet have a "bottom" sexuality and prefer to follow in the bedroom.(i.e. all the stories about high power NYC bankers who see their Dominatrix on their lunch hour)
It's also perfectly natural to have a "submissive" psychology where you prefer to be part of a team rather than lead it yet "Top" in the bedroom and lead sexually.
The possible combos are as varied people. Dom/Top, Dom/bottom, sub/Top, sub/bottom, Dom/Switch, etc, etc. You get the idea.
It's good to discuss this with your wife. Explore where you each maybe on each of the spectrums. My fiance and I occupy the same spot on the "Top" sexuality spectrum. Knowing that has helped us so our needs are not competing. However when I'm stressed at work i become much more sexually submissive to her though nothing else in my psychology changes. When the stress goes away it normalizes and levels back out.