covering windows in kitchen???

I have 2 windows I'm covering in my kitchen. One is a triple window which will have 3inch blinds in a stain to match my cabinets. My problem is I'm not sure what to do with the window over my sink and the back door which has 12 panes.

First the sink window. It is actually two separate windows. First, they open with a crank so if I used the same blinds, the crank would stop them from going all the way to the bottom of the window fram. Second, there is a piece of wood in between the two windows which takes up half the depth of the frame, so if I put one blind covering both, it would stick out a little beyond the window frame. I wanted to put Hunter Douglas Provenance natural woven blinds on this window. I thought this would have less depth than the 3 inch blinds, so it would sove my dilemma, but a blind installer recommended against this. He thinks they might fall apart if gotten wet. And he thinks it would look funny having two different types of window coverings. What is your opinion on this?