Albums not appearing on artists page

[freya_mck]

So I use Spotify in my kindle fire, and whenever I search an artist up and look at the albums on their page, only a few of their albums appear. However, if I search the missing albums up (still on Spotify) then they come up (they are registered as albums and not playlists). Does anyone know why this happens because it means I'm missing out on so many albums as they're not appearing on the artists page. Thank you!