Can't figure out the contradictory HDD LifeGuard Diagnostics data and also, Model Number

These are standalone external drives connected through HUB. I bought a new one now, a 2 Gb drive. Yesterday it was mostly green and today it started to develop several red items in the Data Lifeguard diagnostics. I just don’t understand what each item means and how to read it. For instance, the helpfile says: “An impending degrading or faulty condition is indicated when the calculated Attribute Value becomes less than or equal to its corresponding Attribute Threshold value.” This is contradictory, because all values and thresholds are zero always except for PZT failure detection which has 100 as a threshold but the estimated value is always 0. So, I do not understand how to read these data, why there are increasing numbers of red items even in a 2-day old drive. Can anyone tell me if it is to worry or not to worry, or this is a bogus report and CHKDSK is the appropriate one etc…?

Thanks