When a character is distressed and takes more stress they draw an Insanity card.
If they draw an appropriate card they place it down in front of them with...zero tokens?
So a character will only retain the insanity if:
- They are distressed
- Gain another stress
- Draw an maddness that befits the situation
- Gain MORE stress, while distressed to put tokens on them.
- Then later, fail the roll to discard that Madness.
If that is a correct assestment then that is a a ridiciously complex process to retain madness.