Have you received the interest yet?

If the amounts lent are identical and the loans are all started on the same day, then the interest payments should be the same assuming the rate of interest is the same

These figures will, of course, only be the same for the month in which the loan is bought. My loans bought in Sep all tally on both pages.

gwenynwyr:  Further to the explanation above from skippyonspeed, might you have invested in PBL067 and PBL081 back in August?  If so, look at your transaction entries for 31/Aug and you may find that the 'missing' amounts were paid on those two loans at that time.

This is my first interest and I was quite surprised to see SS paying interest on each piece of loan, rounding it to the nearest penny.
I was expecting they would add all the pieces' interest and round the result only in the end.
As I see it, one could get a few pence more or less. 

This isn't the real problem, but someone could use this in his favour.

For example, if I invest £5,100, in 30 days I get £50.30  (=5100*0.12*30/365).
But if I buy 10,000 pieces of £0,51, I would get £100.    (=10000*round(0.51*0.12*30/365)

A bot could easily do this.

Someone please tell me I am wrong. 

Because of the way SS hide the accrueing intererest, and they only show 2 decimal places ie to the nearest penny,  I haven't been able to check it until a payment is made.  Sadly there was an error,  which on the surface appears to be exactly 1 day of interest, but might just be co-incidental.  Because I personally find the SS way of showing interest and loan parts awkward, frustrating and irritating,  I haven't got round to debugging yet, I have to drink alcohol to scramble my Spocklike logic!!!!!

It is self-calculating using the TODAY() function and formulae I have written myself.
If you want to have a go yourself.  It took me a couple days to decide the best way was to split it into 4 tables, ie

"Active Loan Parts" - this has 3 (yes 3!!) separate interest columns "Accrueing", "Expected Accrued Total for Current Month" and "Total Parts Interest" for each loan part.  The last being the equivalent to what you see on SS "Live LoanParts" page dropdowns ie interest earnt since I started the loan.   Could have had 4th one ie Loan total that just added all the parts together but thought that was making it complicated!!!!!!!

"Loan Parts Sold during Current Month"  - (because there is unpaid accrued interest to be added to the Active Loan interest payment, in the previous table.)   Just 2 interest columns (phew!)  "Accrued" ie the current month total up to date of sale, and "Total Parts Interest" same as previous table

"Loan Parts Sold" - Once again 2 interest columns "Total Parts Interest" same as previous table and "Loan Total Interest" this shows the Grand total of all the Sold parts for each loan as shown on the SS page.

As I sell an active part I manually cut and paste it into the 2nd table and modify the formulae to stop it accrueng.

After the accrued interest is paid on the 1st of each month, all of the contents of 2nd table gets transferred to the 3rd table then there is a bit more faffing about to do.

The 4th table is for "Repaid Loans" just to match SS, which to me, is not really necessary.

Once I have fixed the bug, I will automate the all manual shuffling with macros.

I usually enjoy little projects like these......but not this one.   I designed one for my AC account which was a LOT simpler 'cos they show 15 decimal places and no individual loan parts!!!!................................now there might be a simpler way, but I haven't seen it........ confused............I am.......now, I need more beer!
 

I noticed an interesting 'issue' with yesterdays interest and the SS statement's.

30th Sept is the end of my Company year so being efficient I downloaded a Tax Statement yesterday morning and it showed Period: From 1st October 2015 to 30th September 2016 ... Total Interest Paid £X.XX.

Then interest was paid on the 1st of October .... but on your personal statement it shows as being paid on 30th Sept (as normal) .... so download another Tax Statement and lo and behold 
Period: From 1st October 2015 to 30th September 2016 ... Total Interest Paid £X.XX + interest paid in October but backdated to September.

So I now have 2 Tax statements both stating Report Generated 01st October 2016 but with different amounts of interest paid 

Now obviously I can sort this out easily at my end but if I was the type who simply took the statement as 'gospel' (or wanted to) there are various interesting scenarios that could be explored by those wanting to 'explore the tax system' ........

.... perhaps savingstream needs to perform a tweak to get rid of this anomoly.