Board Thread:Questions and Answers/@comment-32886675-20171009211350/@comment-24356739-20171010000853

That's not a glitch. It has always been like that. The inbox only show up to 100 items (25 pages) even though it's unlimited (as long as they're not past 30 days expiry date). It's best to clear your inbox often to avoid missing out rare swords you might have them hidden after 100 items.