Hello SeoMoz community.
I'm a new member here and i took the 30 day trial to test out your tools and to check if i find a need to them.
I've a situation that is bugging my mind for a few days and i wish i had more data to have more accurate information. I have a website that stayed on first in my SERP for a competitive term. I did it with a very few links because i focused a lot on the UX (mostly on site performance & layout) and the outcome was a good usability for my site. Since the latest panda my site dropped from first to fifth and then came the Google dance between 5th and the 15th position. Then i decided to change the theme because i saw loads of problems like the page titles, i fixed loads of 301's and 404's, gave it a more clean UX, removed some ads and fixed some of the url's making them shorter and more accrued. This stopped the Google dance completely! And now the site is on the 10th position.
I'm not complaining about the positions or panda updates or whatever happened. I just would like some comments on this situation. And i would like to ask if a theme update making the site better (better is a very complicated word in the SEO world know) can give negative feedback to the search engines?
Thank you.