Ok guys so I have a really strange problem, 3 weeks ago I got a message in my webmaster account that my website increased in not found errors (404) . I didn't check my account at that time so I didn't see the message and everything was ok until 1 week later when I got the same message again and 5 of my keywords dropped 200-300 positions, and 4 of them remained the same (increased in time) . Anyway, after the 2nd message I checked all the errors and fixed them and submitted my sitemap again and waited for google to update again but so far the rankings for those 5 keywords didn't come back, and the keywords that haven't been affected had increased . Any ideas or suggestions here ? Thank you .