Interest for cancelled sales

Interest is accrued daily at midnight on loans held which does not include loans for sale, therefore you will just lose the interest on the loan parts while they were up for sale.

That is what I thought, but as I said I have only done this once a while back.  It's a pity you can't see the interest accrueing daily like on AC

I'm pretty sure you're right - the end date of any loan part is the time you put it up for sale so when you cancel a sale and subsequently sell later, it is the later date that is used to calculate the interest accrual.  You can see this if you look at your loan part listing which shows all interest paid & accrued for every loan part you have past and present.  This definitely appears to be the case if you cancel before a month-end.  However, I'm not sure if it holds true if the loan part is on sale over month-end when interest payments are made based on the data at that point of time (which will say that you are owed interest up date of sale).  It all depends on how they calculate monthly interest payment, ie either (1) calculating total interest that has been earned from the start of time less actual interest paid, or (2) just calculating interest earned since the last payment date.  If it is 2, then unpaid interest in the previous month may never be accounted for or paid.  It should then show up as a reconciling item between actual interest paid and received and the total interest shown as being earned under My Loans.  I'll cancel a sale over month end and see what happens..........

I'm still quite sure you don't receive interest when loan parts are put up for sale. That is why the pop-up warns you when you about to list the loan, that you will cease to earn interest.

Yes that is quite right, but....... if you cancel the sell, I believe interest that was lost is regained.

Yes, as the start date is the same as it was before being put up for sale even though the part is now split off from the original chunk it may have come from.