Fixed them now as well.
Its the raritiy of the cards. R is just short for Rare, SR for Super Rare and so on. The frames of the cards show which raritiy they belong too.
It should be under the normal type skills. Usable in any form. I can see it in my skills. Will check on that in more detail later.
Thanks and yes I found a few more, I will look through all of them just to be safe.
It's: "If it's not too much of a trouble, would you mind letting me study them as well once you are done?"
It should be under key items. I definitely used it when testing the quest so it shouldn't been broken but I will check later just in case.
Yes already got reported and fixed, it seemed to be the fragment from the second dungeon with the time travel. Inteacting with a safe in 0.9 will also set that right.