Teradata Senior Technical Writer interview questions

The process started out weird. Their HR person kept calling at odd times and we played phone tag for several days. Then, she suddenly called and asked if could do a phone interview only a few hours later. Phone interview went fine and it progressed to an in-person interview. The questions and experience were average. I sent my thank yous a day or two after. But, the interview is the last I ever heard or saw from them. No email telling me they were pursuing other candidates, no phone call to let me know I wasn't in the running. Just a black hole.