Appointments System sending out two confirmation emails

Hi,

After upgrading Appointments+ to the latest version it seems to be sending out two confirmation emails when I make a test booking on my site.

I've upgraded my other sites and they seeem to be sending out two confirmation emails too so I think it's in relation toAppointments+ version 1.9 or my server I guess.

I've sent my self a test email via my SMTP plugin and it only sends one email though which makes me think it's something to do with the plugin.

Can someone help investigate please

Kind Regards
Kieran