If you need to ensure that your SLS files are executed in a sorted order, then simply use this init.sls file.
{% set dirpath = '/srv/salt' | path_join(slspath) %}
include:
{% for file in salt['file.readdir'](dirpath) | sort %}
{% if file | regex_match('^(\d+.+).sls
, ignorecase=True) %}
- .{{ file | replace('.sls', '') }}
{% endif %}
{% endfor %}