Visit the Team Iceshanty Proshop
I have a 949 and my poles look similar to yours "s" shaped. Some more then others. Also can have walls pop in while trying to pop out others, and I always have lines to the ice from the outside of each hub so they don't pop in with a bit of wind. When they pop in they do have some force..so I think u are good but hard to say for aure
One of the original hub shacks was made by Eastman. They made the Ice Cube and one thing that was really good was that they designed a type of compression stabilizing strap from corner of the the shelter to corner on two sides of the shelter along the ridge of the roof. The shelter was designed to be slightly loose - so no bents poles. Then when you have it set up, you cinched down the straps and it tightens up the corners. It stabilizes the shelter when it's windy, less wobble. I also use the straps to hangs stuff on too. Of course the Ice Cube was made rather cheap in quality and material but it was very well designed in some aspects.What other manufactures have done is made their shelters a bit tight. It bypasses what Eastman has done to address that. So as it goes, the results are sometimes, bent poles on the shelter from out of the box brand new after set up.
I have a Fatfish 747 bought in 2014. The roof poles have an s shape to them when it is set up. Never actually noticed before this post. Have had no problems.Sometimes I have had issues where wind (or maybe me moving the shelter by one corner) has caused it not to sit square and then the poles do weird things (like cover the doorways) but pushing out the corners usually fixes the issue.