WTF?

IEC which i mine in my private pool last hour is gone???
it's not funny.
What happend ?
net diff is down. and my miners (i have 200Mh scrypt) mine to my wallet about 150 IEC with 45 min.
but after 45min all IEC is gone.
for example:
Status: 234 confirmations
Date: 13.01.16 21:30
Source: Generated
Credit: 1.60000000 IEC
Net amount: +1.60000000 IEC
Transaction ID: 2513ae5fd8fc369292fc00241c0bcc00c1089ecc7f53c7df1a2610baf8e33806-000
But IEC from that transaction after 21:31 min is gone.
well i mine from 20:45 till 21:30. It's like was some troble with NET. and i just got a little fork chain which was deleted by IEC net.
So i dont have any questions.
Just heat a atmosphere about hour

About POS. U dont thinking about hibryd mining like PPC, NVC?