Unless we have missed it the board does not clearly indicate which is the Senatorial support track or which is the parliamentary support track.
Parlimentary = nobles (sword)
Senatorial = magnates (cup)
As the nobles feast action is marked on the board by the cup symbol we assumed that the left track was for the nobles and therefore nobles moved on the senatorial track as that is the track that moves when you take that action. From you response that appears not be the case.
You're right. Noble's feast effect actually applies to the magnates' support track (senatorial). The problem is probably only a matter of the English translation of the rules.
If I now understand it correctly the magnates are associated with the cup track which is the senatorial track. Similarly the nobles are associated with the sword symbol and move on the right hand track known as the Parliamentary support track. If that is correct then perhaps it would make more sense for us to refer to the nobles feast as the magnates feast to avoid confusion.
From your response it would seem that abilities on Senatorial office cards must be taken during the special action phase. The rule states "a special action is playing one of the Policy cards or using the ability of ecclesiastical courts hence our confusion about using the abilities on other Senatorial cards.
No, no! As a special action you can use only the abilities of ecclesiastical (church) office cards (purple ones), which is quite clearly stated in the rules. The ability is marked with a star and only this ability is usable in the special actions phase. Other offices give you static bonuses applied in appropriate phases of a round.
No 11 Supremus Thesaurarius
This is therefore used during the special action phase to steal 1 ducat from another player and constitutes your special action for the turn
You use it in the income phase.
No 8 Vicecancellarius Regni Polanie
Similar to 8 you move one foreign country marker left or right as your special action for the turn.
At the beginning of the foreign policy phase.
No 5 Cancellarius.
How does this work in The special action phase as it allows you to spread influence which happens during the foreign policy phase.
It works in the foreign policy phase
No 14 Mareschalus Curiae.
Do you need to use a special action to get the vote from this office.
You get an extra vote for free at the beginning of the Sejm phase.
I hope I made it a bit clearer. If you have any more questions, have a closer look at the player aid cards - all the symbols on the cards are explained there. And feel free to ask here if you still need some clarification