You’re right. There are two plugins on this particular site and I mixed up the support contacts. Thanks.
I’m looking at an issue with this as well. The order in the admin console shows June 3, 2018 at 7:38 but then when I click on “Print Invoice” it says: 04/06/2018
It moved the date ahead and formatted it d/m/yyyy
You can see an example here:https://cl.ly/s5TD