Triple Posts in Database and Fatal Error

I added 176 posts and when I edit last post its says post no. 473.
Why its showing #435 while I only have 176 posts? I checked the database and found that 1 post added x 3 or 4 times 🙁

And now I am Getting Errors: “Fatal error: Out of memory” from last night. I tried very hard but did not resolve it. I searched on this forum but did not find a permanent solution for it.

I installed the script 2-3 times.. its working fine but when I installed some plugins and add some posts .. its start giving “Fatal error: Out of memory” error.

I added: php_value memory_limit 64M in .htaccess file and tried to add in the cache.php file… but failed 🙁

Since today’s morning I can’t login to my admin area: http://allaboutfitness.info/wp-login.php
and now site is showing these errors too … what’s the problem ?

What should I do to clear this error and why its adding 3-4 posts in database??

Thanks