Arx Fatalis/Arx Liberatis Sequence Breaking?

Forgive the slew of colloquialisms and non-specific descriptors that will plague the discussion to follow.

First off, I am not

1. Very familiar with Arx Fatalis and how it works (and the updated for Windows-8 Arx Libertatis freeware)

2. Big on power/metagaming

3. Looking to break the game/deal with issues that come with it.

Now, Arx Fatalis is a game I just bought on Steam a couple days ago. It ran really weird, so I found the sort of unoffical patch for newer computers "Arx Libertatis" so that it would run smoothly. Basically, I am level four, haven't really taken the time to truly specialize in any fields, and am doing what I assume is the main quest. (I am investigating that guy who was murdered by cultists, the little girl was kidnapped and sacrificed because I failed to save her, etc.)

In that particular area, I came across a purple force field, which I assume Dispel Field will get rid of, I haven't actually tested it yet, but I was working on it. At that point, I noticed that there was an opportunity for platforming around the area, which I assumed may lead to some hidden goodies.

Here is the problem:

It lead me into a secret backdoor area into that weird pyramid thing full of snake people that said I wasn't ready to enter yet. I got in, opened the door (I was apparently in some form of treasure room that triggers hostility), died, tried again, THIS TIME WITH AN INVISIBILITY POTION. With that, I got into some form of throne room without being attacked, and spoke to a red snake lady. Now my character is talking about a weapon called Zohark and killing this Akbaa fella and all this other crazy stuff I'm pretty sure I shouldn't know about yet.

So... does this break the game? I was under the impression that the game was very non-linear. I don't know what I'm supposed to do since the girl I was supposed to save and the demon and the cultists are dead. I found what I assume is another sequence break with some giant black beast that is unfightable, and very difficult to outrun, at which point I totally ditched the area because it scared me shitless.

I don't want to cause awkward holes in the games plot and skip/have to re-do anything or anything crazy. I mean, I already totally emptied that little treasure area. I'm just curious why they'd make the area so easily accessible if it skips an unknown portion of the plotline. I didn't 'metagame' or break anything, I just leaped up a clearly intentional alternate pathway, and through a clearly intentional hole in the pyramid thingy's side. Heck, there were even traps and baddies along the pathway. Is this just poor game design? I love the game so far.

I'm probably going to reload to before I talked to the snake lady. I'm just curious how people new to the game should go about this kind of thing.