Emails from the same sender with the same subject (not threaded) act as a single email

[Avrution]

Example, I send myself a text message from my phone saying "testing" and then an hour later send another message saying "new message" - there will only be a 1 on the email count for the icon.

Only the most recent email will show in the summary and if you archive/delete that message it will apply that action to all of the emails (be it 2 or 20).

In previous versions the multiple emails would display, but you couldn't apply the quick actions, now only one shows and quick actions apply to all.

[inbasic]

Example, I send myself a text message from my phone saying "testing" and then an hour later send another message saying "new message" - there will only be a 1 on the email count for the icon.

Your email client might be grouping emails sent to the same address into a single thread. Try using the Gmail interface to send yourself two separate emails. When I do this in Gmail, I receive a badge showing "2."

Additionally, you can check if Gmail treats the two emails as separate by visiting https://mail.google.com/mail/u/0/feed/atom/inbox. If both emails appear as distinct "entry" objects, Gmail considers them separate messages.

if you archive/delete that message it will apply that action to all of the emails (be it 2 or 20).

Do all the emails come from the same sender?

[Avrution]

Different threads, this is in gmail with threaded view turned off. They show in gmail as 2 or 4 different emails, but in gmail notifier as only 1.

All from the same sender. Especially if there is no subject and from the same sender.