Only two pages of unread posts are shown

[ulux1]

Since yesterday, when I go to "unread posts", the site tells me that there are (for example) 453 unread posts but only two pages (= 100 threads) are actually shown. Until yesterday the other 253 unread posts would appear on page 3, 4, ... Is this an intentionally change or a bug?

[observer]

For a faster work of server I limited quantity of search results in 200.
Now you will see 200 last posts.