@Coreth ,
Alright, now I have an idea of where you are. I'll suggest this to you, if you're going to focus on the kanji and not worry about readings, you should learn their meanings and writings, and really not worry about readings. I don't know where you got ひにち from, but I'm pretty sure I've never come across it. I'm sure it's out there, but if I saw 日日, I'd read it ひび (although more likely than not it would be written 日々).
You clearly need to learn about the types of readings and rules for euphonic change (音便) as well. Check out
this post to get you started. A more detailed explanation can be found at
Wikipedia's page on kanji. That page also has information on the construction of the characers, and the six types of kanji (六書 (りくしょ)).
The readings you can leave alone until you actually start reading, and comics with ふりがな are good for that (although they can be creative at times...). Now, there are times when you just have to know the word to know how to read it, but that doesn't mean it's not a good idea to learn the readings. For one thing, an educated guess is usually better than a blind one, and for another, once you know about the 音符 system guessing readings of characters you've yet to see becomes immensely easier (although this can possibly be picked up on intuitively just by reading). But like I said, if you're going to leave readings to the side for now, leave them to the side. It'll become a lot clearer when you start to focus on them.
Man, you take a little time working on a post, and everything changes from when you started.
Well, I'm just going by Wikipedia which says the list was revised on 30 November 2010.
Ah. I never remember seeing a fixed date, and to be honest with you I was never all that concerned, because I already know them (or if I don't, there aren't many new ones I have to learn). Although it'll be nice to see kanji words written in kanji more often, instead of that mixed writing nonsense (like 迂回 being written う回).