My Server had 8 Slots when I added it.
After a While I changed the Maxplayers to 12 - it works fine, but on this Page http://www.gametracker.com/server_info/server.php?GSID=1446639 it shows 8 Slots the whole time - how can I update this?

Your server is still reporting 8 slots, not 12. I would recommend making sure that you updated the command line, config, or wherever the number of slots is defined. If you have a server host, they should be able to help you get your server running on 12 slots.

Like I said..Its running on 12 Slots the whole day, add it in steam you´ll see

Add the server on HLSW (hlsw.org) and you will see that it only reports 8 slots.

wtf..hm.. strange..

Serverconsole says: 518,7 fps 0/13 on de_piranesi
Maxplayers is 13, 1 reserved
Steam says 0/12 player?!

According to your signature, it looks like you have fixed it

Installed HLSW
It says 0 / 12 just like Steam does

Hehe.. and your Site tells me the same now:
PLAYER STATS (VIEW ALL)
Current Players: 0 / 12

So thanx, case closed for me

Waaa - theres definetly something strange going on here - but it is my Server, sorry.
HLSW says players : 0 active (13 max)
Just after mapchange it says 8 Slots again - everywhere. Wtf?
Serverconsole stays:
22:20:17 maxplayers
22:20:17 "maxplayers" is "13"

Grr.. dunno whats going on..

Does it run custom mods or maps? Is it possible if those set restrictions for number of players slots available on a map? You could try switching between default maps and custom maps to see if there is a common behavior.

yes AMX and such stuff - i disabled all plugins for testing now - but its still 8 on HLSW and 13 in the Console