Question 2. The weight of the fish appears to be inaccurate.

The weight estimates are derived from tables that were pre-loaded into the application.  Nothing is going to be as accurate as a certified scale; however, the charts can be pretty accurate.  A fishing buddy caught a Striped Bass that measured 43" and weighted 27.5 lbs on his Boga Grip scale.  Prior to that I had caught a skinny 43" Striped Bass that we estimated to be around 27lbs.  This examples tells me my original estimate of the weight of that fish was pretty accurate.

These charts can be updated so please feel free to reach out to me with any updated conversions.  Thanks.