Same Meta description is being shown on Google?

[webguru2014]

Not sure why this is happening but when you this command into Google

site:"mywebsite": + "key phrase"

It brings up pages from my website which have the key phrase but I have noticed that Google is using the wrong meta description for all of them even though these pages all have their own unique meta description

Does anyone know why this would be happening?

Thanks

[JaneCopland]

Google will choose a snippet it feels is appropriate based upon the user's query, and often doesn't choose the meta description. Do your descriptions show up as the snippet if you search for a query related to their content, rather than for a site:"mywebsite": + "key phrase" search, i.e. just [key phrase]?

[DeanAndrews]

Does the site use filters (ie dynamic php)

For example are the results that you are seeing when you enter site:"mywebsite.com": + "key phrase" similar to

mywebsite.com/SomePage/?col=red
mywebsite.com/SomePage/?col=blue
mywebsite.com/SomePage/?col=green&ftr=23

So my question boils down to are there question marks in the URL of the pages that are appearing in the search results?

[KeriMorgret]

Google will sometimes choose what it thinks is the best snippet for your URL, depending on the search query.

[Vizergy]

...check the alt text.  It could be alt text to a common image.

[webguru2014]

No the description does not exist on the page, I am getting 30 or 40 odd pages showing up with the same snippet from a unrelated page on all of them?

[Vizergy]

Creating a meta description tag does not ensure that this is what Google will show.  If 'Google' believes there is a more relevant snippet to the query somewhere - anywhere - on your page, it will show that instead.

So - my question is this: Does the description that is being shown exist anywhere on the page, or is it some arbitrary snippet?