Longtime user, but NewsBlur is loading only a limited number (about 20-40) items at a time; then it is necessary to reload. This appears to apply to top level only; it does not seem to occur with subsidiary sites. I have 51 sites currently, about 3000 items in all.
That is weird. What client are you using, the web?
I may have seen this too, but it only happened when I was reading a story. Oh shoot, I just realized what's happening. About a week back, so when you wrote this bug up, I changed the dashboard river to perform a full reload every 60 minutes from every 10. That should fix much of the problem.
Come to think of it, I should probably turn off dashboard river reloads while you're reading the folder it's in, thereby preserving the cached list. ... Fixed and deployed. Sorry for live debugging that one but it got it fixed, so there's that.