Current map rotation...
beerrun_b7a_0331
berserk_te
braundorf_final
capuzzo_final
decay_b7
erdenberg_t2
et_mor2_night_final
etl_adlernest_v4
etl_beach_v2
etl_frostbite_v17
etl_sp_delivery_v5
fa_bremen_final
fa_italy_b3_fixed
fa_oasis_b3
fragginhart_v4
fueldump (original)
goldrush-gals
grotli_final
pirates
radar (original)
snatch3
supply
sw_battery
transmitter
venice
23 maps in total + 6 original maps (railgun, goldrush, osasis and battery are always hidden.)
Excluded maps :
[players 0-19]
g_excludedMaps ":railgun:oasis:goldrush:fueldump:capuzzo:battery:venice:grotli_final"
[players 19-27]
set g_excludedMaps ":railgun:oasis:goldrush:snatch3:beerrun_b7a:braundorf_final:battery:"
[players 27-*]
set g_excludedMaps ":railgun:oasis:goldrush:snatch3:beerrun_b7a:braundorf_final:etl_sp_delivery:battery:supply:pirates:etl_beach:"
Min map age (How many maps until you can vote for the map again):
g_minMapAge 9 (it will say on server "10 maps ago" )
That's why you can only see around 10 maps on the map vote screen. The server has already played 9 maps, plus the one currently being played, and has hidden bad maps based on the current player count.