Preview Snippet Problem

Good Morning Everyone

On my website http://www.bankaccounts-for-badcredit.com I am having a problem with the Preview Snippet. When I key content into the Title and Description boxes it starts to put the same wording into the Preview Snippet box but when I click update it just quotes Bank Accounts For Bad Credit in the title rather than say “Bank accounts for bad credit is a guaranteed form of bank account”and then a different description to what is in the description box. This only happens on my home page. On other pages the Preview Snippet is based upon the title in the box and the description in the description box.

Can anyone tell me what the problem is?

Many Thanks

Alan Hope