So from what your saying, your doing readings, and then your surprized that the readings you recieve , contain information that either you know or know is likely.
The cards are vague enough to mean anything, and your mind fills in the blanks. Here are a few explinations for any sucess, though, without a proper study, this is all kind of peeing in the wind.
So you were looking for a job i assume, which means you put out more than one resume most likely. So the chances of you not getting more than one call back are fairly slim unless you applied for jobs you had no qualifications for.
If this is a friend of yours i assume you have heard him talk about either not liking his/her place before of of moving.
The prediction for your sister was a 50/50 so you have a huge chance to be right. Now if you factor in that women are more picky about people they date than men, your almost guarenteed that the guy wouldn't be someone she would be impressed with.
All and all these is nothing that really needs explaining, the cards are designed to be vaugue , and you found out some vaugue things, most with 50/50 chances of happening.