Cockayne never played Super League with Wakefield before signing t'other season.
He started his career with Hunslet, then Doncaster, then joined Hull KR, where he made his SL debut. Therefore, he is not a product of Wakefield's academy.
Similarly, Kyle Wood never made his SL debut with Wakefield. He started his career in the lower leagues again with Doncaster, Sheffield before joining Huddersfield.
You Wakefield fans seem to think that homegrown is translated from "scholarship". It isn't. A player could play scholarship at 16 but then move on to another club, play academy for two seasons and then play semi-pro/pro debuts.
As such, homegrown is defined to me by where they make their semi-pro/pro debut.
As for the other points, the second bit is now 6/28 after Annakin played today (i believe). It may be the case that other clubs have signed your product but I guess that goes for all clubs. Indeed, Cas could point to the likes of Olivier Elima, Ryan Boyle, Liam Watts, Ben Gledhill, Shaun Lunt, Jamie Cording, Ben Blackmore, (Matt Dawson but never played first team), Westerman, Arundel, Lynch and so on as former products of our academy/first-team