1) AAxp doesnt work on latest server versions. The devs need packetcollects from Live to be able to work with them once again.
2) Its a known problem, however the mob direction in combat has been fixed from i think a 4th April version (get the source code from here
http://cvs.biosprite.net). The other problems should be fixed shortly, as I dont think its that much of a deal. Imaging even I was able to fix the incorrect heading upon spawning of the mobs in the source.
3) Most probably they dont exist in your DB. You can either create them yourself or wait for someone else to publish a DB with these spawns.
4) I'm not sure about that. There was once a server release that NPCs actually helped you by buffing you and such. Not sure about guards, help. Maybe its a faction issue or something deeper.
5) Go to the 3rd party tools Forum and you will find at least 2 very nice loot editors there. (by Sandy and me)