A lot of people complained about early-game Eddies like him and Wickerman being the 4 star they got from souls, so we removed them for the time being.
Oh weird, that should be 7 different levels of extra damage, but some of the levels are indeed missing values. We'll get that fixed for the next update.
If a skill level is for "Effect Chance +#%", then that effect chance is for all effects that have a chance (so for that Warrior Undead Rescuer's Guide, it improves the Steal Beneficial Effects and the Heal chance).
What character(s) are you using?
That's odd... if you force close the app and relaunch do you not see them? Keep in mind that they may not be in the same place in the Achievements list based on what other achievements you have or haven't completed yet.