I was able to figure an explanation for yesterday's odd draw (1 week gap draw but only 3350 ITAs).
Just my guess, CIC might be planning to do 3 draws on all the months with 5 Wednesdays and 2 draws on all the months with 4 Wednesdays.
Jan, May, Jul and Oct have 5 Wednesdays. All the remaining months have 4 Wednesdays.
11,150 ITAs already issued in Jan.
3350*3=10,050 ITAs each in May, Jul and Oct
3350*2=6,700 ITAs each in the remaining 8 months
Total in 2019: 11150+(10050*3)+(6700*8)=11150+30150+53600=94900 ITAs
With this approach they can meet the ITA target for 2019.
I hope this is not their plan as it would mean higher cut offs in the coming months due to reduced draw size (3350 instead of 3900).
Let's wait and see what happens!