You may install the latest version of the BIOS no matter what previous version you have installed. They do not need to be installed in order as each new version includes changes from all previous versions.
2. Is there any reason NOT to install A11? Should I stop at A10?
A10 – For my future GTX 9xx graphic card. (true)
A11 - For my future Win 7 to Win 10 upgrade. (true or false?)
3. Are these procedures correct and not missing anything?