I think you don't have enough logos, PVRX2 will not display the logos, if you have less than 50% logos for channels.
Change <TVGuideHeaderType> to 0 in the config.xml and PVRX2 will display all logos.
Give that a try.
Lounge: HDPC Intel i5, Asus Motherboard with Intel HDMI, 4Gb of Ram, 1Tb Disk, 60Gb SSD, Blackgold BT3595 Tuner, Hauppauge Nova T500 and HVR1700 in a LianLi C39 B Case.
Other Room : Liteon Wireless Media Centre/DVD Player
Software : Windows7 32 Bit, RedRat, XMLTV GUI and NPVR