On the phone app -
Go to the Account section (top right corner)
Scroll down to goals
Choose Nutrition & Body
Here you can manually adjust your target weight, start date and starting weight.
This will then show your total weight loss, rather than just since the last new target
I had this problem initially. I had an end goal weight in mind, but I set myself an interim target so it didn't seem so daunting. I reached that first target and set the new one, but all my progress to date disappeared. When I changed the settings as per the above, I was able to see the full progress
