Duplicate Package or Else?

I have applied the script to enable cachyos repositories on top of Manjaro.

I have upgraded etc. everything works fine.

I am just a bit perplexed about whether packages are now duplicate in my system.

For instance if I run:

pacman -Ss firefox | grep installed

the result is:

cachyos-v4/cachy-browser 134.0.1-1 (cachyos) [installed]
cachyos/cachy-browser 134.0.1-1 (cachyos) [installed]
cachyos/librewolf-bin 134.0-1 [installed]
extra/firefox 134.0.1-1 [installed]

what does this mean?

is cachy-browser coming from either cachyos or cachyos-v4 repository?

before switching to cachy I always saw listed packages as coming from a single repository and not from more than one simultaneously.

I see only one cachy-browser script in /usr/bin

and only one cachy-browser directory in /usr/lib

any clarification will be welcome

The former.