Sub end-date keeps changing on the Battle.net Launcher?

I swear my subscription has been changing at a rate that isn’t normal, so I’ve begun to document it.

This screenshot I took on January 2nd, 2022 – actually, I can’t even put links in my forum post… (even though there is an OPTION in the forum post maker) – my screenshot on january 2nd said my sub ends April 16th, 2022

This screenshot I took today, January 5th, 2022 says my sub ends on May 2nd, 2022.

I believe this second screenshot has the correct date – but what is the reasoning for it even changing at all? And why can I not include links in posts??