well they say "it happens." and more often then some might think. and not the sort of "drop" where you lay it down, or even moving. sometimes bikes fall, it seems. who's fault? hardly the point once on the ground
i "centerstand" mine sometimes, too. i do not like hopping on when on the stand, however. and if i do "pushing" it off the stand can surprise a person on some surfaces. here at home on concrete it just wants to slide on the stand before it drops. i am sure a solution exists (rubber boots on its "legs" maybe) but its not a huge issue being i don't use the stand too often
when i do use the stand i use the technique you used when your bike fell. i push it "off" the centerstand and let it fall to the kickstand side of the bike. so far so good but as said it is not done too often, preferring to use the kickstand most of the time when parked
that said i have had two low speed drops which are another story for another time. bike intact, ego out of whack, but i'll live with it