okey. I was playing on beer (as always long and boring introduction, if u r lazy to read it start here -> ) after map finished (standart map) in rotation was 'burning1' and 2 players didnt have that map.
after burning1 loaded it was changed by callvote to mkexp. We started to play on mkexp, while that 2 guys were in specs with 'connecting' msg instead of ping value. I looked at +scores and at that 2 keels that shows blue and red players amount. Both had +1 to amount of players i saw in scores.

Also i saw several times guys with ping 999 in red/blue (not in spec) team via spider (while they were just connecting).

Edit: forgot to point that keels showed 5v6 despite really we were playing 4v5