Apple said it will ship in October, not that a final release date would be announced in October. I don't see any reason that they'd miss that date, especially if the rumors of an event last week in October turn out to be true. There's has only been one notable issue reported with the most recent build, and it doesn't sound like a big deal. They have a couple weeks if they need it so they'll probably go down to the wire. If they don't fix everything in time they'll just have a quick software update.
The insistence from some that it won't ship in October just seems like wishful FUD on the part of those who want to see apple get a black eye from the press.
I'm not sure what you mean by "we were told earlier days", there have been plenty of rumors but the word from apple has been simply "October" (with most people assuming late in the month).
Here's one of the statements from apple saying "scheduled to ship in October"
http://www.apple.com/pr/library/2007/06/11leopard.html
Duh, why would Apple delay Leopard 6 months just to delay it again by 2 days, thats ridiculous.
"Let me tell you how it will be
There's 31 days for you, 33 for me
Cos I'm the taxman, yeah, I'm the taxman"