Autocomplete - keyword order issues

Having some problem with autocompletion order of keywords.

The structure I use is using PageObjects structure, i.e.

• Sources
  -- Test Cases
  --- Suite 1
• Resources
  -- common.robot
  -- portal.robot
  -- PageObjects
  --- administration.institution.businessunits.businessunit.robot
  --- administration.institution.businessunits.robot
  --- administration.institution.users.robot
  --- administration.institution.users.user.robot
  --- administration.robot
  --- footer.robot
  --- landingpage.robot
  --- modal-dialog.robot
  --- screening.robot
  --- topnav.robot
  --- aaa.default.robot

In the PO resources I have several keywords, like "view details", "get count of xyz", "click button A", "click button B" etc. In all the .robo files I have manually sorted the keywords alphabetically (A-Z)

When in the upper level file, portal.robot I define keywords and try to use autocompletion I'd expect it to be sorted by alphabet but it's not (in fact I don't know what's the order, can't evaluate it).
Example:

In the keyword "X1 " in portal.robot I put string "Admin" and use autocomplete (Ctrl+Space). This is the list I get:

administration.institution.users --> few keywords from this file
administration.robot --> few keywords from this file
administration.institution.businessunits --> few keywords from this file
administration.institution.users --> few keywords from this file
administration --> few keywords from this file
administration.institution.users --> few keywords from this file
[...]

The logical order for me would be:
administration --> all keywords
administration.institution.businessunits --> all keywords
administration.institution.businessunits.businessunit --> all keywords
administration.institution.users --> all keywords
administration.institution.users.user --> all keywords

or all the keywords begininning with the gives string in alphabetic order.