I discovered another difference with the new board. A few weeks ago, I got logged out of MomMD somehow and didn't notice, and after that, whenever I checked the board, nothing was flagged as new. (With the old board, everything would be flagged as new in that situation.) So I would leave the site, thinking that nothing was happening. I finally figured it out and found 3 weeks of posts that I missed.
I have found the Recent Topics tab to be the best way for me to approach this new forum and find all new content easily, in case that is helpful for you. I will show your post to our technical admin, though, to see if there are any other issues.
Recent Topics tab is very helpful, thanks for highlighting that. Now I think I'm mostly encountering the 60 minute reset. The recent topics tab helps a bit with that, though. Thanks so much for all your work on the site!