Neopians spell things in a slightly inconsistent way... especially when it comes to capitalization. Unfortunately, with a wiki, different capitalization may take you to a different (or non-existent) page. We try to create redirects (pages when an alternative name, spelling or capitalization will send you to the primary page), but we don't always catch it. (Plural versus singular -- items versus item -- can cause a similar problem.)
Neohome, neohome and NeoHome have been set-up to take you to the same page (NeoHome).
NeoPets and neopet don't go to the same page. NeoPets goes to a page about the game/company/Web site. "neopet" redirects to NeoPet which talks about pets on the NeoPets site.