Different content shown on Facebook Page
I've got two subpages on a website with WA SMT code on it. Both like buttons work but on one page the content shown on the Facebook page is not correct. The code is the same.
Am I right that the content on the Facebook page comes from this META Tag:
<META NAME="Description" CONTENT="This is the content being shown on the Facebook page">
If the script shows the CONTENT from the homepage META tag instead of the subpage with the code on it, what might have gone wrong?