Terk, I think there is a problem with the last payout on the old platform.
On my account, I see a payout of 0.00023938 with this txid : 949554f2f34beb64a06c8ffea58a4230fc461d0572a995d0258ed944788955c5.
But I didn't received it on 123ta35pH43kosWrdf8rSeFUMWsVdNzETC
Could you please verify ? Thanks !
EDIT : ok, misread your post with the < 0.001, sorry !

Yes, you're right. You figured it out but I'll repeat here for others who might be confused.
This is a bulk transaction in which sub-0.001 balances were transferred from CM1 to CM2. On your payouts list you see an actual value which was transferred for your username, but when you click to look in the block explorer there's a bulk value of all user balances combined. If you see this, it means that this "payout" was credited to your CM2 account.