strong spirits have been known to move things. [trust me, the spirit i live with just hid my favourite pair of earrings for a week, then they appeared on my dresser sitting on my phone you get use to it.] i'm not sure about deities though, but they should be able to do so.
in regards to your socks, i wouldn't go so far as to say Athena's messing with them at night. in the past when i've worn socks in bed they come off either because i toss and turn, or they bug me and i kick them off. i've woken up some mornings wearing only one, it's probably just falling off as your move in your bed at night. coupled with you calling to a higher being, you're jumping to the conclusion it's them. i would look for more evidence. while i don't work with Athena, you might notice things like a scent [if she favours a certain type] other objects she favours have gone missing, sounds like the woman wishing you goodnight. normally though deities will visit when called upon and leave when the circle is done. you should say goodbye to them, i have heard of certain deities that can linger to teach a lesson. as i said, i haven't studies Athena, so i don't know i she's the type to plays tricks [like Loki] or attack those who called upon her for no good reason. [Lilith]