I haven't earned either one yet but, judging by the achievement description, here are my guesses on the Klepto one:

1: Some mages such as Xae, Gygar, and Talix, have 2 starter cards so make sure you've grabbed both their cards if playing with one of them.

2: I would hope that treasured cards don't count as trying to get 8 cards instead of 4 would be a lot more difficult, but again I don't know. If they DON'T count then make sure you haven't swapped in a treasure card for one of the regular unique starter cards if playing with the #1 scenario above since maybe the achievement would require both Gygar's uniques (for example) but the treasure card replaced one of them.

3: The achievement just says "in posession of" rather than "in the hand of" so maybe you can try again, gathering all 6 regular and treasured cards from the other mages into your Geode mage without having to worry about getting them all in one hand.

4: If none of these applied then maybe you can try saving/reloading the game after getting all the cards and see if maybe that triggers the achievement (like forcing the game to do a card check on loading or something).

Only other thing I can think of is it's bugged somehow. Maybe a dev will respond to this thread or maybe you can try their Discord channel if they have one.

I don't know what the Same Old Trick achievent requires so no input there from me.

I ended up getting Kleptomancy by playing against the Ageless Walker in a normal game and using the exiled pile. It triggered as soon as I picked up the 3rd one. So much easier. Still curious about the interaction of the achievement with the treasured cards though.

Funnily enough I was playing with Gygar! But he was the one gathering the cards so I didn't need to worry about getting both of his uniques.

I've still got the expedition run going where I'm working on Same Old Tricks. Just that and the one where I have to win at 1 life for the mages/Gravehold before 100%.

Ok, for posterity:

Same Old Tricks requires that the three mages using their own treasures not be accompanied by a fourth mage. (I suppose it would work if that fourth mage were also using a treasured version of their own starter... but I can't test that anymore.)

Originally posted by Zzoyd:

I've still got the expedition run going where I'm working on Same Old Tricks. Just that and the one where I have to win at 1 life for the mages/Gravehold before 100%.

I'd recommend taking a look at a thread by Beowulf about a year ago (probably 2nd page of topics) titled "Achievment bug". He includes a screenshot of a run he played with 2 mages where he got both mages and Gravehold to 1 life before winning and the achievement didn't unlock for him. I replied with my thoughts on possible reasons so checking out that thread may help you plan your attempt.