Unprofessional reference check
I have a question about a reference check.
I applied for a position at an educational institution in November. At the end of December, I received notification that I'd be interviewed in mid-January. The interview was two hours long and seemed to go very well, though I wasn't asked for references.
I later found out through the grapevine at my current employer that on the day before the interview, the potential employer called my current employer to inquire about my performance. (I hadn't included a list of references or permission to contact any employers in my application. I had included letters of recommendation from my current employer, though from 2008. I also work for a professor at the institution to which I applied and included that information in my application.)
The interviewer never asked me whether she could call my CURRENT boss, nor did she tell me that she did so after the fact. My current employer has had a very high turnover rate for employees (15 have been fired or left in the last 3 years), while I've stayed and received raises. I have good cause to believe that my boss gave me a bad reference, because I earn a lot for the company and there are fewer and fewer people doing more and more work.
And I didn't get the position. And on top of that now my current employer knows I'm looking for other jobs... forget any future raises or promotions.
Why on earth did this interviewer do that? And what can I do to prevent that from happening in my next application?
Any advice is much appreciated! Thanks.