I don't see a problem with your chain. Turn and adjust the silver chain NOT leather dear! It should be fine.
As for the wrinkles I guess it might happen in the future due to Chevron design. I told myself I am going to accept it, use it and enjoy it in the future. Since I love this Chevron caviar combo so much!! Mine is not 100% perfect.
I made a poor attempt to "describe" this, but your pictures are truly genius! seriously that is so awesome.
I have a chevron lamb as well and it seems that for the same exact bag (design, season, material) those that had wrinkles they don't come out/get better, if they don't have wrinkles they sort of stay that way unless you abuse it of course, and those that had little wrinkles here or there they seem to also not get worse/more - theory here seems to be that it seems to be related to whoever's making it the workmanship/how it was worked with, and then it's a matter of whether or not what you see (as is) is okay with you on that particular one.