It makes sense that the one you repaired says OK. Using the Arduino IDE to re-burn the bootloader should also set the lock bits properly after burning.
All Kickstarter units probably will say Bootloader UNLOCKED!
And, although @bateske has stated that production units should have the lock bits set properly, there is some evidence that this is not the case with at least some of them.
Are these Kickstarter or production units? What message do you get on the last line of the sketch output? If it says the lock bits are 0xEF, the sketch should and this with 0x3F and then compare with 0x2F and then report LOCK bits are OK. Are you sure the untouched units report Lock bits: 0xEF ?