Unless you're printing with both nozzles you shouldn't be heating both. A hot nozzle will ooze, it's one of the major difficulties with multiple color/material prints.

Now, realizing that you're said this is the test piece off the SD card, I'm pretty sure that it SHOULD be a two color print which would explain the file having instructions to heat both nozzles. Sounds like your file is a bad one. Try a different copy of the same thing (you can probably get it on thingverse) and see if it prints with both nozzles. If it doesn't then there's something else going on but until you do that initial test there's no reason to worry about other issues yet.