Youre not alone shibro! Got many orphaned blocks too ...
normally all few days 1-2 orphaned blocks :/
Yes, I have noticed too, it's very annoying. Eg. a while ago we worked on block #67410, over 24M shares, it took 35 minutes of work and finally all effort was for nothing, block is orphaned.
What stratum your using? Try using the one with the easier difficultly, I saw much improvement in the number of orphan blocks.