Email Notification Plugin 2.3.1 – Question marks appearing when they shouldn’t

On my blog, I use Email Notification 2.3.1 Plugin. When I submit a post, it works fine (there’s a bug, but it doesn’t interfere), however in the email sent, at the end of most sentences there is a period, which is normal, but right after the period is a question mark, which shouldn’t be there.

For example, I could write “Test post.” and it’d show up like that on the blog, but in the email, it will show up as “Test post.?”.

Also, I still have a bug that hasn’t been addressed at https://www.ads-software.com/support/topic/71072?replies=1 . If someone could help me with that, I’d be very grateful.