The reboot when you unmount I am unsure about, but the deletion of items on the memory card is a known issue within Kitkat, there is a fix for it if you are rooted.
The people of XDA, including the Devs. Do not have to help you. We all choose to help. Everyone also starts somewhere.
City I live in makes and invented the Kitkat... I run Kitkat on my device. Aww how cute.