Promotion Headline link

Aloha! The promotion headline "BUY NOW" link keeps resetting to an incorrect web address. Not sure why this is happening but every so often I get notified that it is linking to a 404 page even though I do not change the link. I am using the child theme to make all edits as I did change CSS to remove date from homepage featured content. Does this have to do with it? Please advise. www.ClubMauiTheatre.com Mahalo!