As I don't have seen this issue at any of my sites, I can't help you with a specific solution. But you can try to follow the general debugging steps:
- go at Settings -> Permalinks and re-save permalinks (just hit the save button without any change) - this will ensure that your permalinks are correctly settled and interpreted.
- you have included your sharing links in a table, BUT to align this table, you used <p style="text-align:center";>yourtable</p>. Replace the p with a div (<div style="text-align:center;">yourtable</div>) because is not correct to include a table inside an inline element.
- finally, if the previous steps don't help, disable your plugins and re-enable them one-by-one, testing which one break the right behavior of links.