Post indexing problem. Need some help

So I have this PR 4 website I have bough since January 2013.
I have routinely post new articles on in.
Each post takes only less than 24 hours day to be indexed by Google.
But I have made my 2 last post since 5 days ago and bought are not indexed yet.
My article is unique. NO spun article.
I also have submitted to GWT since January and no critical issues.
What is wrong?
Is it just that I have to wait longer?
The last thing I remember to do is I have changed the theme of this website, but after that I have changed again to the 1st theme since it looks better.
Any suggestion guys?

Hello, hope you are well. Sometimes we face this kind of problem.
I think at this time, you need to ping all your content and make some quality backlink which will help you to be indexed your content and increase your traffic with PR.
So, to buy some quality backlink you may visit Backlinking4SEOSite. This is really a great site which provide quality backlinks.
Thank You
Toruntora

Your really overthinking the whole thing. Having a article take a few days to get indexed isnt out of the norm. Just take a breath and keep adding content and you will be fine. Maybe even ping the articles a few times or use a indexing service like indexification.com which is one of the ones I use and I can tell you there great. Good luck and keep writing

Try submitting a sitemap to Webmaster tools. + Use googleping.com or any other pinging service to ping your site. A few high quality backlinks will also help in this scenario.

There are a several steps that you can do. First, try pinging the domain. Second, build a couple of links to your website and ping those links. And third, make sure your settings are set to index your website in Robots.txt or Wordpress.

probably you just need to wait longer..

On a busy domain i have, i have made some mods last week and i still see old cached page in G results.. Google is somewhat slow from a week.. either something is broken or something big is coming soon..