I’ve had a few Liteon drives in the past and found this as well. Over time, I have stopped trusting their scan results. I contacted Liteon numerous times about these types of issues (and others) but they just kept telling me my drives were defective and misc. BS until I got fed up with them, took a haitus from their products and then tried another a while later and was still underwhelmed (1633S). My Samsung drives which use the same Mediatek chipset as your Liteon drives often shows scan results which are nothing like the BenQ scans. Some make sense, others are bagged on my Benq’s but claim to be insanely good on the Samsung itself. In general, I find their results to be optimistic if they actually provide accurate data.
On the other hand, I have had four BenQ’s (currently a DW1620, DW1640 and DW1655) and they all produce near-identical and repeatable scanning results compared to each other. The BenQ’s provide more scanning info as well. I have a Plextor PX-716A as well which has similar but proprietary features and I have been disappointed by the quality, performance, and reliability of it. It’s the most expensive 12x writer you can buy!
When I first heard about BenQ supporting these advanced scanning functions I almost laughed, but after owning a few of their recent products I’ve found they are a far different company than they were in the past. If you want a fast, reliable and full featured scanner for an excellent price, buy a BenQ (and you won’t even need to find doctored firmware to make it work right). Just my opinion…