AGP cards use the PCI controller, and so are listed as PCI. It shouldn't be anything to worry about.
The resolution problem is more likely to be related to your monitor getting its specifications wrong, rather than the graphics driver; try entering the monitor settings by hand, or try reducing your refresh rate.
To fix your network card, first identify what it is. It will probably be listed in the output of the command
Run that in a terminal, and post the results for the network card please.
Hope that helps,
—Robert J. Lee