Hi vasonson,
Thanks for opening a new topic :). Your English is fine, I perfectly understand you.
In the next update, when your theme is doing it wrong, you can remove the website’s name from the title. Alas, 2.6.0 isn’t ready yet.
You have two options:
1. Wait for 2.6.0 to come out (Released in 2 to 5 weeks, circumstantial).
2. Follow the steps below to make your theme do it right if you can’t wait.
If you can’t wait, and chose option 2, continue:
Step 1:
1. Create a child theme based on your current theme. If you’re already using a child theme, nothing has to be done.
2. Activate the child theme.
Step 2:
1. Go to your parent theme’s header.php
file through FTP.
2. Copy it and place it in the child theme’s folder.
3. Make a backup, for if it goes wrong.
4. Remove the code <title> ... </title>
from there, and everything in between.
5. You’ve now removed the wrong title output.
Step 3:
1. Go to your child theme’s functions.php
file.
2. Add the following line:
add_theme_support( 'title-tag' );
You’re done! Your website’s a bit faster now.
And now you can also remove the website title from the title output.
You can do so through the Title Settings in the SEO Settings Page :).
I hope this helps! Let me know if you need further assistance.
Note: Keep backups for if it goes wrong!