Why does eMClient produce empty duplicate mail folders?

I have a problem with my local sent and trash folders subbed to my @gmail.com account… My inbox is just fine, but when I send an email, it doesn’t show up in the sent folder. So too, when I delete an email, that email does not show up in the trash folder. I need to go to my gmail account to get any of those emails I either sent or deleted (should be in trash folder).

Why is this? Very inconvenient to have to go to google email to access those emails.