If the rankings are going to stay, which I highly believe so at this point, I need a clear explanation how the whole scoring works. This is because my skill score would skyrocket up or down during a map I spectate on or join for a brief moment despite not playing the map in its entirety. In other words, my skill changes when I don't physically play on some maps. Also, there are other times where I did fairly well on a particular map (e.g. 55/3) and my skill would go down.

I don't understand how the whole skill score works prior to the weapon weighting.