The first one looks like an AUR package (specifically the PKGBUILD… which you need to accept or exit usually).
Also, as the Arch User Repository … it is technically unsupported. But you can see more about it all here: Arch User Repository - Manjaro
The second one is an over-1-month-old change that was adopted from Arch and mentioned in the update announcements.
PS. I fixed the title and categories because spelling and this has nothing to do with plasma.
PPS.
pamac. You mean pamac. Use the words. pacman couldnt possibly have your first problem.
(because it does not interact directly with the AUR - something you have obviously enabled in the pamac GUI, but do not fully understand)