iMore

ok so i opened my itunes on my mac and noticed that on the corner there was the iphone icon that usually appears when the iphone is connected to my mac through usb to lighting cord. i was confused because to my knowledge theres no itunes wireless syncing unless you have icloud backup turned on, which i dont. so i clicked on "back up now"and it actually backed up my iphone. i looked at my phone and the two arrows in a circle were moving.i repeat my iphone was not connected to my computer and icloud back up is not on. am i missing something here? am i going crazy? Let em add that i have a 2013 mbp and an iphone 5s. i also have a 6s but it doesnt seem to happen with the 6s