Meta Description not displayed properly - Please help!

I have a website using Joomla, and I've set the home meta description. However strangely for some keyword search, my site was still displayed in Google with default Joomla description "Joomla! - the dynamic portal engine and content management system."
But with some other keyword, my site is already displayed with proper description.
It seems to me that Google is indexing my sites with 2 versions?? But both are exactly the same URL (www.mysite.com). And I've set the Canonical URL properly.
The site is still 3 months old.
Any advise for this situation? Thanks in advance.

When did you last updated your meta description?
It may take some time for meta changes to appear in the index itself.

To make sure that Google has indexed your description, you can do a "site:url" search. If it's not indexed yet, just wait.

SupremeDev said:

When did you last updated your meta description?
It may take some time for meta changes to appear in the index itself.

To make sure that Google has indexed your description, you can do a "site:url" search. If it's not indexed yet, just wait.

Click to expand...

I updated the meta description about 2-3 weeks ago.
The site is already indexed with proper description when I do "site:url" search. But as I said, for at least 1 of the keyword search the site was still indexed (or displayed) in SERP with Joomla default meta description.

What is your website link ? PM me i might help you .