I have some cases to explore...
CASE 1 :
I have already 1 slot filled with an active patron card
I earn a new patron card.
If I'm right I can switch my active patron card with the new one (I have only one slot)
Where do I put the replaced active patron card ? In used or in unused cards ?
CASE 2 :
I have no slot for patron card
I already used one patron card and so it is in used cards
I earn a slot
1st question : Can I put the used patron cards in it ?
2nd question linked to Case 1 : If I get a new patron card, I may replace my active patron card with the new one. If it's goind to unused, I can use it again and re-do all the sequence for each slot ?
So I can use a patron card more than twice (as writtent in the rule) but 5 times (becaus I can have 5 slots)
The rules says, you always put the replaced card left. The answer for both case is in the "Advanced rules" in the rulebook, in the card actions:
"Note: It may happen in the advanced game, that when freeing up an active patron slot, a patron from the right side (used) can enter this slot. If you replace such an active card with a newly bought one, then it still goes to the left side. In this special case, you may use this parton card twice for extra actions."