That happened to me too, OP6 here
Unless you use oxygen updater you'll have to wait until the OTA reaches you
Well, I would not suggest to do so but feel free to do it, if any problem occurs delete updates and try downloading a slightly less recent version
Try uninstalling camera updates in the applications settings panel
I guess you're trying to say that some photos are heavier than others, and that's perfectly normal, it only depends on the photo's content, the...