Reusing Site Content Without Triggering Googles Duplicate Content Filters?

I have a quick question and hopefully one of you can help me... I spent a tremendous amount of time writing unique articles for one of my websites, the articles are on average 1200 to 1300 words long and I have about 10 of them. I was building the site offline and I sent it to one of my VA to put on online on one of the specified domains I gave her. She accidentally put the content on an old penalized site of mines and because the content was so rich, google instantly indexed it (which is not a good thing in my case).

So basically what I want to do is reuse the content that she accidentally put on the penalized domain and put it on a brand new domain (which she should of done in the first place). Here the thing, I've read through several threads on the forum regarding this issue of re-using the content again. Most people said you have to simply:

Remove all the content from the penalized site
Add robot.txt "Disallow: /"
Then Ping
Go to WMT and Deindex the site and the inner pages
Then Ping Again
Transfer the new content over once the old site is no longer indexed.

I follow these instructions and my old site was deindexed completely within 2 hours (no cache or anything). I even checked copyscape and there was no trace of my articles, it brought back 0 results (which is good). I then transferred the content to my new domain, google seem to only index 2 of my articles out of 10...2 Day's have passed now and the other articles are still not indexed despite their being no trace of it online.

So my questions is this, is this normal when doing the process listed above? Does it take google a while or something to reindex the old articles? Or is this a sign from google indeicating that their not going to index the content since it first appeared on another site (despite the site no longer being indexed).