First off, good quiz overall. But I'd note two flaws.

1. No option to say "No Opinion" or "Unsure"
2. Some questions seem too loaded/carry too many assumptions with them.
2a. These questions also tend not be fully clear all the time on what they're asking.

[img]http://www.politicalcompass.org/facebook/pcgraphpng.php?ec=-5.50&soc=-6.51[/img]

^This was my first result which I found a bit odd, I excepted to be more Left than that.

So I re-took the Quiz to get another look at the questions, and I think these may be what threw it off.
Also, some where I simply disagreed or agreed I took one step up just cause I would re-look at them and find I wasn't stepping it down cause I saw any kind of leeway or exceptions, but rather I was going "I do agree strongly here, but I agree even stronger in these other questions". But that probably was throwing off the quiz a bit.

[hider=Questions I found odd]
-"from each according to his ability, to each according to his need" is a fundamentally good idea.

I simply went "agree" here, but this was partly cause I wasn't 100% sure what it was trying to say.
I assumed though it meant "People work where they work best, and people get helped where help is needed". So I clicked "strongly agree" the second time.

-Land shouldn't be a commodity to be bought and sold.

This seemed to hold a bit too many assumptions behind your beliefs depending on what you said.
Honestly all I care about in terms of land is everyone has a roof over their head and no one is left on the streets.
And said houses/living conditions should fit a family comfortably and not be cramped. As long as the government makes sure that's covered, I don't really care if it's sold or not.
I voted "agree" the first time cause I assumed the quiz thought clicking disagree meant "everyone should be expected to buy their own house or suffer".

The second time I clicked "disagree" cause ultimately, I don't care for if land is bought or sold as long as that housing situation is covered.

-A genuine free market requires restrictions on the ability of predator multinationals to create monopolies.

I looked it up, closest explanation I got was "When two companies merge into one".
So I clicked "agree" the first time cause I know the abuse that can happen when a company has no competition.
Second time I clicked "Strongly Agree" just cause I double looked at how big that abuse can be.

-The prime function of schooling should be to equip the future generation to find jobs.

Technically, yes. So I clicked "agree" the first time. But I'm not sure if it's using the literal term of Job (temporary employment) when compared to career (employment for life) or if it was referencing both.
I think Education goes far beyond that as well, to make people more aware of the world, more intelligent etc. But without some way to pay the bills, or exercise their skills for society we wouldn't last very long. 
So Jobs are kind of important, but those Jobs should be whatever we want to be, not specific things. 

I'm not sure if the quiz is accounting for all this though. It could either mean find jobs as in "Find a way to get paid, get out" or "I dun ned nu educatin to wurk...".
Giving it the intelligent benefit of the doubt that it's the former, I changed my answer to "disagree" the second time.

-Charity is better than social security as a means of helping the genuinely disadvantaged.

This one's not so much odd, if I understand it right. 
I took it literally as "what works better for society". The only thing throwing me off in thinking this is a moral rather than a technical question is the fact this was under the Religion section of the quiz.
I just did "Strongly Disagree" both times. Charity is great, and can be a powerful tool. But I find it's better for support to be from a constant, reliable and dependable support system, than it is to be from an organization whose funds are dependent on how generous the public feels like at the time.

Note: Every question in the Religion section I clicked "Strongly Disagree" for.[/hider]

[img]http://www.politicalcompass.org/facebook/pcgraphpng.php?ec=-6.00&soc=-6.56[/img]

^And this was my second time.
Left is only very slightly more left... :/

I'm still a bit lost even after that one on where I was seen as right.
But whatever, I'm majority left according the quiz and that's close enough I guess.