Yes, they have a chance.
Most of the stuff on here are what I call guidelines. They are not absolute laws of nature with guarantees that if you do it this way everything is fine and if you do something else you are guaranteed failure. Not that at all. All the guidelines do is improve your odds of success. There are plenty of us that don't follow all the guidelines exactly and do OK. I don't follow all the guidelines. I don't know all of them to start with, and sometimes I don't have the situation or facilities to do it that way.
Something else about the guidelines. They are often over-the-top. They are intended to cover everyone in practically any situation. Take the heat in a brooder recommendations for example. 90 to 95 the first week and drop it 5 degrees a week. If you have a decent brooder with good draft protection, or you have enough chicks so they can keep each other warm, you certainly don't need these temperatures. They will normally thrive at lower temperatures, especially after a couple of weeks. But if you have a drafty brooder and only a couple of chicks, you may need the warmer temperatures. Some of the guidelines are here to protect those few that have other problems or don't have the perfect situation. For a lot of us, they are over-the-top.
I'm not saying to ignore the guidelines, not at all. They are there to improve your odds of things going OK. I try to follow them as well as I reasonably can, but I don't obsess over them. Just do the best you reasonably can in your circumstances and you will probably do OK.
The reason you should store the eggs pointy side down is so the air cell stays on the fat end. It's possible the air cell can move and the chick won't develop right or may have trouble internal pipping if you store them wrong. It is possible, but it is not guaranteed. The longer you store them the wrong way, the more likely you are to have a problem, but people have had good hatches even if they stored them wrong for a while. Just get them in the incubator right.
For what it is worth to you, someone recently posted they incubated the eggs the wrong way and still had one hatch. A lot did not hatch, but at least one did after incubation the wrong way, pointy side up. So I say yours do have a chance.