Api Order Status Update - What Goes On?


So I am experimenting with 3rd party order management solutions and have a product package builder on site which has been giving headaches with odd totals previously.

I am finding when this 3rd party addon is updating the status the order totals are being refreshed and causing an error with discounts? Is this normal to have any effect on totals potentially when simply completing an order?

Also with the rest API for updating an order if these are not specified but as default they are normally notified do they get notified here?

"notify_user": "1",
"notify_department": "1",
"notify_vendor": "1"