My website http://www.yes-wellbeing.co.uk has recently put in alot of coding after the URL/permalink e.g http://www.yes-wellbeing.co.uk/schools/?doing_wp_cron=1362076154.8357429504394531250000 instead of just ending after/schools/. I have checked the permalink and it is set to 'Postname'. I have tried changing the permalink to 'Custom Structure' and using /%postname%/ to see if this would solve the problem but it reverts back to 'Post Name' setting as soon as I Save Changes. The site appears to load quite slowly as well and I think this is due to the problems with the link structure.
Can anyone help me solve this problem?