Sorry that you found the installation instructions confusing. They have been refined with each release based on user feedback. But further constructive suggestions are always welcome.
It is a fairly complex install, which is why it's important to follow the instructions carefully and in order. From your description it sounds as though you first did step 2, then step 3, came back and did step 1, skipped steps 4 and 5 and are now unable to do step 6.
If that's accurate, then there's a big clue as to the problem. Step 1 must be done first. It can't be done after step 2 as Admin Profiles would block you from reaching the Admin > Tools > Install SQL Patches page. So this suggests that you have installed the files in the wrong place, which would also explain why step 6 doesn't work. I recommend checking the precise locations into which you have installed the files, against those helpfully listed for you in step 2 of the instructions.
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