Why do you suppose that on some of See Level's self-assign shops they don't show you the range of dates that are available? All you can do is click to accept it and then once you've done that go to the shop log and see what the date range is. You have no idea if it must be done today, or next week or whatever. It's kind of like Shopper Roulette. I realize that if once you know the date range it won't work you can contact the scheduler and cancel, but even so it would be nice to know in advance what the dates are.
What's done is done. An egg cracked cannot be cured.
There are 3 kinds of lies. Lies, Damn lies, and statistics.