Mobile Me Won't Overwrite iCal Data from Mac --- Cloud, iPhone Data Screwy

Question

(yes, this is the THIRD time I've posted substantially the same message in different sections of this site. I realize that's a violation of standard protocols. But this is a problem that effects three different aspects of my Mac life, and I don't know where the solution will be found. So... )
I'm having a heck of a time getting the calendar on my iPhone to look the way it's supposed to, and the problem seems to stem from MobileMe not over-writing the data on the cloud.
Right now, the calendar data on my iPhone is completely screwed up. I have events that appear four times, etc. That is NOT how it looks on the Calendar on MobileMe, but that's how it looks on the iPhone. And it SURE doesn't look like that in iCal.
In fact, iCal is right now the only iteration of my calendar data that is (mostly) correct. So I have tried now multiple time (at least six) to OVERWRITE the data on MobileMe with the data on the Mac. But each time, after I go to MobileMe to look at the Calendar, it doesn't look like anything has changed.
Meanwhile, it looks like the data on the iPhone is just getting more and more screwed up. I keep a sunrise/sunset calendar. On my iPhone, the sunrise time now appears FIVE times today.
I need to get the Calendar right right in iCal on my Mac; then overwrite the data at MobileMe with that info, and then overwrite the data on the iPhone. So I am having essentially two problems:
1) MobileMe doesn't seem to overwrite the Calendar when I instruct it to overwrite;
2) If I ever do get the data right in MobileMe, I don't know how I'll ever get that data (only) down to the iPhone. It appears that every time the iPhone syncs, it's sending data to MobileMe, which is causing duplications, which are then sent to the iPhone, causing still MORE duplications.
Yeah, it's a mess. I should be able to get it right by over-writing the Calendar data in MobileMe, but, like I said, half-a-dozen attempts and it's still not working.
Thanks,
--PS

Answer 1

If you find out the answer to this, let me know, I'm having similar problems, can't seem to overwrite mobile me, and then mobile me calendar never matches ical or iphone calendar, very painful