What you are experiencing is the presence of a vacuum created between your storm door and interior door. That's what it's supposed to do as odd as it sounds. As you walk into your house, let the storm door close and latch first (it should do that once the interior door is open, as there is no longer any vacuum pressure to prevent the storm door from closing). Then close your interior door (you'll probably have to 'push' it closed due to the 'vacuum' created). When exiting the house, you close the interior door, and you'll have to push the storm door closed. This tells you that you have a good seal between the doors providing the insulation value you are looking for. This is also all proven by the fact when you put the screen in the door, there is no vacuum produced, and the storm door should close easily. The only way to relieve the pressure while the glass is in, is to raise the bottom door expander (I'm assuming there was one), allowing for air to escape when the doors close. This of course also results in lost insulating value in the winter. It's a trade off.

I have kids who constantly slam thier bedroom or bathroom doors, is there anyway to quiet the door slamming noise ? Your help in this matter will be greatly appreciated! Thank You for your time.

walterjackson, you should install a spring like system which will prevent the doors from being slammed with wall or anything else. It'll be better if you check
a contractor soon.

My pella storm door is extremely hard to depress when exiting house? Is there an adjustment?