From the image you can see the storm door latch is too close to the door knob causing you to scratch your hand when you try and open it. There are about three layers of support behind that catch, too.
The storm door fits well where it is, and doesn't look out of the ordinary, so I don't know what to do about the catch.
Best Answer
Consider replacing that door catch with one of this style. It would be a lot less traumatic to the knuckles when you use the regular door knob.
Alternatively you could consider a change of the regular door knob to an exterior lever style unit. These have additional benefit in that they can be opened by means other then a free hand which can be useful when you come in with two bags of groceries.