Paypal total paid problem

Hi
I can't work out why, as the Paypal plugin update hasn't been updated in over 3 years, but it has begun to work properly - inputting data into the correct fields automatically, which I always have had to do manually.

However there is one problem, which affects two fields in the reservation back end page, but will also affect other fields elsewhere.

The total paid field, and the amount paid field in the payment history, are both incorrect. I don't know whether it has doubled the amount, or added 1,000... please see attached screenshots.

The Paypal payment is a set amount of 1000 THB, and is correct in my Paypal account. It is also correctly 1000 in the reservation deposit amount field, above the total paid field.

I have manually amended both fields to avoid issues when sending out emails, etc.

I wonder if the paypal amount paid field is adding the original deposit amount (set in the Experience/Publishing tab) to the Paypal amount paid? ...or something similar?