sharing counts on buttons disappeared

Could you post your site URL here, so I can have a look?

If you want it to remain private, you can also contact us via this contact form:
http://en.support.wordpress.com/contact/?jetpack=needs-service

Thanks!

I had a look at your site, and everything seems to be set up properly. Did you recently change your site’s permalink structure, or change the slugs for some of your categories?

Since you use category names in your post permalinks, changing a category slug will change your posts URLs, and services like Twitter or Pinterest will start counting shares for that new URL.

Should I change it back so it reflects the original url?

if the URL is back to what it was before, the counts will indeed go back to normal!