Hi, My name is Eric Moyers. I am a Network Support Engineer in the Cisco Small Business Support Center. Thank you for using the Cisco Community Post Forums.
For questions 1 and 2, This is not normal and may indicate an issue with the firmware of the unit. I would update the unit to the latest firmware available and then manually reconfigure it with the settings. If the unit is currently on the latest, I would reflash the firmware and then manually reconfigure it. If this does not solve the issue. You should call into our support cent and let one of the answering agents work with you for a resolution. (1-866-606-1866)
For your 3rd question, yes that is possible. I would also run wifi analysis of the wireless in your area and see what channels are being used. Then try and move your WPA2000 to another channel.
Again if this gives you any issues, please call in and let one of us work with you.
Thanks
Eric Moyers
Cisco Network Support Engineer
CCNA, CCNA-Wireless
1-866-606-1866