[KWo]

pb_maxbots is the limit for the command fillserver. When You use this command the bots will be added until reaching the limit (meaning bots + humans cannot excceded pb_maxbots). That cvar alos limits You to add manually some bots by pb add commands.
But the amount of the bots is depanding also on:
1. how many pb add commands You used (either in podbot.cfg or eventually by console/menu commands)
2. If You used or not fiilserver command.
3. It depands also on pb_minbots settings

You can predict the place for 10 bots, but You may want to use for some reason lower amount of them for certain time (for example 4). To do this You just need to use pb_maxbots 10 and then You need to use 4 commands pb add. That will keep the constant amount of bots + humans on the server - in this case 4. But later on maybe You want to add 2 more bots - You don't need to change the pb_maxbots limit, just You will add 2 more bots and then You will keep 6 bots+humans all the time on the server. If You don't like the function auto add/kick a bot when the human-player leaves/enters, You need to use pb_maxbots 0. Then You will have all the time as many bots on Your server as many You will add them by pb add (or from the menu) - no matter if the human-players were entering or leaving. That is the basis of the functionality and that should answer to Your question in the first post of this topic.