A complete search of the internet has found these results:
Sorry for the confusion is the most popular phrase on the web.
These phrases have the same meaning, but the word "caused" is almost always omitted from this phrase construction.
300,593 results on the web
I'm so sorry for the confusion about the wedding time. We thought it was at 6:00PM.
Sorry for the confusion--I didn't know this car was yours.
My handwriting is terrible, so sorry for the confusion since you couldn't read it properly.
Didn't I say I would be the one to bring the cake? Oh, sorry for the confusion about that.
We are deeply** sorry for the confusion** this inorrect ticket caused you.
Sorry for the confusion about the results, but it was not the fault of our laboratory.
4,028 results on the web
Sorry for the confusion caused by my thoughtless words. I didn't mean to mislead you.
The told me the show was cancelled. Sorry for the confusion caused and any time wasted.
We regret to inform you that the concert is now starting at 8:00 instead of 6:30. We apologize for the confusion caused.
Sorry for the confusion caused, but I still need to leave here soon, regardless of what I told you before.
These carrots are $3, not $2. Sorry for the confusion caused by this bad labeling.
We would like to say sorry for the confusion caused by the words printed in this book.