People say Bernie Sanders is a centrist. This is extremely false.

Bernie Sanders on the Issues indicates Bernie Sanders is as far left as you can be. 

There is nothing wrong with being far left.  Just don't call yourself a centrist if you are.

The political compass test is a backwards far left test that makes anybody who isn't as left as Sanders on the right.  They claim America has no left wing, but they make the same claim about Canada and New Zealand (2 countries most people would say are left wing).  How is Bernie Sanders a centrist?  What right wing policies does he support?

This is why a better political compass test can be found below that is much better than the most famous political compass test:

Your premise seems quite false.  Please cite three examples of real journalists calling Bernie a centrist.

The Political Compass states

OIP.RpBTa9jXaYLxZg7-PNGfygAAAA (400×400) (bing.com) claims Sanders is a centrist.

1*6D_jbYoJ8o_LudVM20S1hA.png (1826×872) (medium.com) claim Bernie Sanders is a centrist.

But he's not; he's far left.  I don't care if he's far left, but don't claim he's a centrist.

Yeah but this political compass site is not a work of Journalism or factual integrity.  The site says that its makers are anonymous and its scoring system is secret but the NY TImes reported a couple of years ago that this site is run by a radical Zionist out of New Zealand. 

I suppose Bernie suppose might look  like a moderate to some loon in New Zealand just because Bernie believes in wearing pants to work but that's not really a "people say..."    I mean, this guy has Hillary as more right wing than Trump or Hitler and lists Stalin as a left-wing politician.  Since your source is not American and clearly knows nothing about politics, I suggest you disregard his POLTICAL COMPASS as mere ignorance and/or lunacy.

Exactly; if the political compass test is a terrible test, why do people treat it as relevant?

no one thinks bernie is a centrist. 

Bernie actually is a centrist on a fair few matters, even economically (but least so economically).

He is not a Socialist, he is a social democrat.

Analyse his take on almost all social matters, as opposed to economic, and the centrism and chameleon nature that every mainstream politician has become known for starts to shine through.

I've met people that claim Sanders is a centrist.