There was a UI refresh yesterday, which seems they have reversed today. The old site seems better anyway.
I am sure there are doctors on staff there i should be trusting - but changing a live site like that, brrr... gives me a shiver. That's what you have experienced, likely. Clean some cookies and try again. When in such doubt, in Chrome's dev.tools/console i go to Resources tab, Cookies branch and wipe them clean for the current site. I have seen big companies screw their sites by shooting themselves in the cookies - Safeway and Citi come to mind - can't hold Roku to higher standard on that.