Not Another Jacking Thread

[rick3000]

Hi,
I know that there have been plenty of threads on jacking, and I have looked at all of them but I am having a few problems. I am trying to remove my wheels so I can clean them thoroughly, and coat them with some wheel wax.
I started to jack the car up at the alt. jack point a few inches forward of the official rear point. Using these instructions: http://boxsters.addr.com/jacking.htm
I got it up and then lowered it check everything. The crease that you are supposed to use was starting to buckle and bend, luckily I caught it before it got too bad.
So what am I doing wrong?

Then if you look at this thread: http://www.renntech.org/forums/index.php?showtopic=20922&hl=jack
It mentions using the point just behind the muffler listed as the rainy day jack point in the picture. Is that point safe to use?

Thanks!

I circled the part that is bending: