Are you supposed to re shuffle the location decks after each encounter? We've never done so, but when reading about the AH Toolkit it felt like it was implicitly implied that you should. I Took a look at the rules and it just said that the card should be returned to the location deck.

Should it be returned at the bottom? Should the deck be reshuffeled every time an ecounter has been resolved? Or should the deck be re shuffeled when all encounter cards in the specific location deck has been used?

The part from the AH toolkit announcement that I though about was: "The Location Deck tool is perhaps the most time-saving feature of the Arkham Horror Toolkit, as it will conveniently randomize and reveal Location and Gate cards for all of Arkham’s many locales [...], then keep your fingers crossed as the Arkham Horror Toolkit chooses a random result. Including its many expansions, Arkham Horror features hundreds of unique location cards... but with the Arkham Horror Toolkit, you’ll spend less time shuffling, and more time playing!"

The text made it feel like the AH toolkit randomizes a card at each draw and implies that a lot of location deck shuffeling is taking place. Also, if the deck is shuffeled after each encounter it makes the Location part in the AH toolkit more useful since those with the App can draw from their own phones since the deck is randomized at every draw.

If you play as we have, you can be certain an encounter won't show up two times in a row at a given location. But with shuffeling between every draw that is possible (as it is possible if the gaming group is using multiple AH toolkits).

you should shuffle the location decks before drawing. so two investigators on the same location can have the same encounter during the same round. but since you shuffle before drawing, the rules simply ask you to put it back in the location deck after you're done with it.

rules are found in AH rulebook:

page 8
phase iii: arkham encounters
1. no gate

Thanks for the quick answer. Now that I'm re reading the section about encouters I see that it clearly states that you should shuffle, then draw. It never even occured to me before.

What about all the other cards?

H.P. Lovecraft said:

IIRC pretty much every deck, other than Mythos and Other World, are shuffled during setup.

The Mythos and Other World decks contain cards that prompt you to shuffle.

All item decks get shuffled during setup (after allocating fixed posessions but before allocating random posessions).