Should I be worried?
Thanks in advance.
That's redirection and developers and webmasters can redirect one of their domains to one of their domains, you can redirect as many domains as you like to one domain, be sure to check the traffic stat of the site, old and reputable sites have and maintain their traffic stat, and they trace phishing sites they will report it to protect the reputation of their domain so always check stats and take time to check if you are landing on the right site.