Address book not functioning properly
I am on an iMac with 10.8.3 I use Mail for my emailing.
Sometime in the last few updates my address book began to be funky and is getting worse.
1- I cannot delete names or groups. Oh yes, it says I am doing that but then the name or group just pops right back up.
2- Scrolling down is almost impossible as it keeps going back to the beginning. I can only get somewhere by pressing the down key.
3- The same name appears 2-4 times in a group. Several names in any group do that.
4- When, in a group, I go to edit, add new card, it looks OK but then adds a group instead before I have typed anything.
What should I do? Can I trash my address book and get it back from iCloud or what?
iMac, OS X Mountain Lion (10.8.3)