I cannot login with my administrator account using the Mobile interface. Keeps failing. If I go back to the regular non-mobile I can login just fine. Is this by design?
It is by design that a system administrator account is unable to log in through the mobile interface. No administrative functions are available in the mobile interface. Similarly, a domain administrator can log in, but there are no administrative features available.
When viewing the non-mobile in landscape mode the footer is not locking to the bottom of the window, instead it's hovering under the login box.
I have tested SM in Chrome on several test devices in landscape mode, but I am unable to replicate the non-locking behavior you've reported. What device are you using and version of Chrome?