this may seem stupid...but, are the strings that are breaking new or old?
also, are you using an alternative tuning that increases the tension on the string?
and finally, no matter what is happening here...if you have a string breaking in the same place over and over...there is definetaly a problem there that you aren't seeing. You just may have to break out the magnifying glass after all.
I wonder...if you were to completely remove the 2 hex bolts, flip the saddle completely over 180 degrees and reinstall the hex bolts, would have possibly solve the problem?