You fall divisions by losing
You don't lose tiers unless you dodge or become inactive at 0LP

Argh

You said : Edit: Once you go up a division / tier / league, you can NEVER go back down unless you queue dodge multiple times.


So wrong.

"If you fall below zero League Points as a result of decay, you’ll be placed into the next lowest division. If you’re already in Division V of your league, you’ll fall into a new league in the next tier down. This is currently the only way to get demoted to a lower tier."

Read plz.