RLC High Pass Filter Not Working
First, go do a simulation of this circuit...R1 at 10 kohms messes everything up. Try 10 ohms instead. But still it should not be passing low frequencies.

Now go look at figure 11 in your capacitor datasheet. Your 10 nF capacitor turns into an inductor at around 3 MHz.

But this circuit should still be blocking low frequencies.  

Most likely, your inductor is disconnected for some reason. Either a lead is broken or you have a bad solder joint or you tried building it on a breadboard and didn't get a good contact to the breadboard.  So you're seeing just the effect of the RC in series between input and output, but then when the capacitor goes inductive you start to see a low-pass effect because of whatever the load is (10 pF oscilloscope probe, maybe).