Blue Water Blockade

HI

A newbie here. I'm having trouble increasing the percentage of my blue water blockade. I have a number of blockade squadrons that I rotate in and out, sometime having nearly a 1000 pts of Power in the box, but my percentage seems stuck on the original 20%. I keep the squadrons in the box supplied and cohesive, sending them to port when needed and replacing them seamlessly. Am I missing something?

Please help. 

I did not find the right solution from the internet. 

References:- 
http://www.ageod-forum.com/viewtopic.php?t=51703
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Thanks