It's not just you! Sounds like you are doing a great job candling to me...maybe it's just too early to tell for some?
Are they shipped eggs? If so, I would say yes to the saddling in the air sacs. Blood rings means they are dead though and that can also be from shipping. If shipped eggs aren't packaged well, they just have a really hard time developing. I got some that were mailed on their sides and they all had detached air cells. They can hatch alright even with the funny looking air cells though so think good hatching thoughts. The only problem I saw was it made it difficult to follow the standard air cell pictures (so much space by day 7, 10, etc...).
Have you seen this article?
https://www.backyardchickens.com/a/step-by-step-guide-to-assisted-hatching If you scroll down toward the bottom you can see some photos of the saddle bag air cells....from shipping.