Have you tried adding some Logging on the sending and receiving apps?
For example just before you send the request to the web service, add a log message. If the log message appears twice, then you have a bug in your sending microflow causing the data to be sent twice.
Never had an issue like that, sounds very odd, it's also quite hard to think why this would happen without more details from you.
It might be worth trying app services instead of web services to see if it sorts your issue. They're a bit more integrated with the Mendix app and I'd say safer for Mendix-to-Mendix communication (they're also really easy to set up), changing over might help you isolate the issue.
Hope this helps.
Thanks for the reply. To be honest i'm not sure why i didn't use an app service does it function in the same way? I could provide more information i'm just not sure what to show you?
Hi here are the microflows
this is from app 1 that has the form.
And this is the app 2 that is being populated by the form
Just to close this off. I noticed that I was feeding in a parameter and creating an object. Hence why it was appearing twice.