re: Removing the trailing slash at the end shouldn’t make any difference for the sitemap structure or the sitemap generated.
Ok, what they say here seems to confirm there is a bug or another issue. The only way the 62 URL were in your page sitemap is if I removed the trailing slash. With the trailing slash there were only two pages. Now, this was with Connections both activated and deactivated so it was not Connections related like the homepage dropping out of the sitemaps.
re: point 2
The page site map always generated with the post name permalink structure on your site, no matter which option I choose. So, it seems like this is indeed a bug too. I, of course, was refreshing the sitemap cache by toggling the on/off.
If they have not logged into your site and looked, you might want to ask them too because there response indicates what I saw were bugs. Perhaps I was doing something wrong or perhaps there is another plugin conflict. So, maybe take a little time to replicate my findings before saying definitively if this is an real issue or not.