Letting two ocelots free and being banned by the grieftrap is not a direct cause & effect. Griefing and getting banned by the grieftrap are correlational.
We would care less about letting two animals free when you paid for them (
in fact, we don't consider that an offense since you did do something to warrant their freedom). We do care more about griefing, and what you did that warranted the auto-ban is not something we take lightly.
As it was already mentioned:
Grief traps time is set at 7 days.