Apache don't load all virtualhost - apache

Question

i have a problem with apache and the virutalhosts on ubuntu server.
The software installed on my machine is:
Ubuntu 14.04.3 LTS
Apache 2.4.7
The virtualhost are configured in /etc/apache2/sites-avaiable/ directory and i have 4 files:
000-default.conf
default-ssl.conf
I maked these files:
site-one.example.com.conf
site-two.example.com.conf
The only difference is the name of subdomain an domain, so, the configuration of both files is:
site-one.example.com.conf:
<VirtualHost *:9292>
ServerName site-one.example.com:9292
ServerAlias www.site-one.example.com:9292
ServerAdmin webmaster#localhost
DocumentRoot /var/www/prod/
alias /a /var/www/prod/a
alias /a-test /var/www/test/a
alias /f /var/www/prod/f
alias /p /var/www/prod/p
alias /p-test /var/www/test/p
alias /t /var/www/prod/t
alias /w /var/www/prod/www/w
alias /t-test /var/www/test/t/
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
site-two.example.com.conf
<VirtualHost *:9292>
ServerName site-two.example.com:9292
ServerAlias www.site-two.example.com:9292
ServerAdmin webmaster#localhost
DocumentRoot /var/www/prod/
alias /s /var/www/prod/www
alias /s-test /var/www/test/www/
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
The problem is when i try to load the url "site-one.example.com/a" the server not found the files but the url by "site-two.example.com/s" works good, i've been trying restarting Apache(sudo service apache2 restart or reload or stop/start) but when i do that site-one.example.com works fine and the other stop working and said "The requested URL /a was not found on this server."
¿How can i find some log file about the virutalhost?

Answer 1

I found the problem, the server fist read the configuration of 000-default.conf file, so i commented all the lines, i restarted apache and works fine.
however, i would like to know, why sometimes apache takes one *.conf file or other???