We deployed several improvements over last weeks regarding the computation, but the current method is still to be perfected. We are also looking in introducing a more general and widely acknowledged way of calculating the return.
In the meantime, I can suggest you using some independent XIRR calculators. Quite a few investors prefer to go this path, since an independent calculator gives you the best comparison of returns earned on different platforms. With the Account Statement exporting feature, you can easily do this.
How's it going with the improvements? I also have a question, I have a 2 cent difference between "funds available" and "earned so far". I do understand that a 2 cent difference is not a significant amount, but..
Is the "earned so far" doing some prognosis how much will I get back from bought loans ?
In one of the posts you mentioned that in back end you're calculating up to 7 decimal places, are the "funds available" and "earned so far" roundings inaccurate maybe?