"Platform" on the sidebar is not in alphabetical order

[Syafiq Segaf]

Hi. I noticed my sidebar is not in alphabetical order. I currently set it to "Platform". It consists of GBC, PSP, NES, PS1, SNES (in that order). Why are they in that order?

It should be GBC, NES, PS1, PSP, SNES.

Thanks in advance.