Okay guys, maybe I found what I was looking for right up front, just ignorant-proof, basically the error must have encountered was almost certainly been mine, because I tried to install in the router to do a clean install, the latest snapshot, and I also had the same screen that you see above. I thought maybe it won't be a fully signed version yet. Well I had to do a hard reset on the second bios, which I honestly still haven't quite figured out how it works, but fortunately it saved me twice because obviously I tried the kernel first and then the upgrade.
So what's the point of my message? Well because maybe people who have a not-so-ordered life, like me, maybe forget that they don't have to install snapshot, and maybe a wording on the firmware selector page would be a great thing!
I take this opportunity to thank again very much all the people dedicated to providing us with such a well-functioning system for free. Thank you from the bottom of my heart.