Wrong sub domain reporing

Weird live/Staging cross links problem

Hi maybe someone can help. We have a live domain.co.uk site and a staging.domain.co.uk site. Today I noticed in our analytics service (getclicky) that customers were on the live site and sometimes then being linked to the Staging site. This is only occurring less than 3-5 % of the time. When I view the live site page they were on prior to being sent to the Staging site the source code shows no link to the Staging site whatsoever. Is it possible the get clicks is reporting this wrong and it's a bug with getclicky?