Hello Pepe,
Please be informed that the Google search has its own algorythm which determines the information to be shown as a page description. The meta description indicated by webmasters is just one of the possible choices. However, in case you added the description after Google has initially indexed the page, description might change after it will re-index it.
If you have any other questions feel free to contact us.
Kind regards,
Eugenie
Seotoaster Support