It's possible their spokesperson was not informed about SimStudio being the basis for Delve. Lots of people in sales and marketing do not know little about how open source software works.
Generally speaking, open source ecosystem knowledge is not something that shows up in job descriptions, interviews, or regular training for non-technical staff in most software companies. Hopefully that will one day be the case but until then there is a high likelihood that misleading statements can be made accidentally.
Every company of non-trivial sizes will eventually hire someone who is a bad hire.