I was always curious as to whether or not redeeming the bl3 weapons counted towards your total of 8. You see I have renewed two of the weapons in hopes of reaching my 8, yet my last two boxes have yet to be filled with check marks. Was really curious in regards to if they counted.
I can confirm that the Borderlands 3 weapons do add checkmarks. Try logging out and back in, that made the checkmarks show up for me.