[KWo]

It's not the problem of podbot mm (nor any other bot), but it's caused by AMX X dev team decision to don't rank bots by default since AMX X 1.76d and don't inform the people about that change. You need to go to Your addons\amxmodx\amxx.cfg and find these lines:
// Rank mode
// 0 - by nick
// 1 - by authid
// 2 - by ip
csstats_rank 0

(0 is needed if You want to whole rank bots)

then after that add this line:
csstats_rankbots 1