I really like this mod

but I don't understand patrol orders system. It's october 1942, I sail from Midway with orders to patrol East China Sea. After 4 days of sailing I got message traffic that there is big convoy heading to Solomon islands. I thought "Great but I am to far for intercept them". After next 3 days I got next message, another convoy heading Solomon..

Ok I reached China Sea. Finished 72 hours patrol wihtout any kill. Next order "Patrol Philipine Sea by 555 km". Huge area but maybe I will have more luck this time. Meanwhile I got 5 other messages about big convoys with support for Solomon Sea. Great but I am about 15.000 km from Solomon...I reached Philipine Sea, started patrol, after 50 hours my first victim, 3500 tons

. I patoled all area with only 1 kill, returned to Midway coz out of fuel. Meanwhile I got few other messages with many convoys heading to Solomon or Celebs Sea.
My question is: why in almost all time I have to patroling the areas where traffic is small and there are areas where big battles continues ? I know I do not have to keep all orders and I can sail to this places alone but I do not see point in don't follow orders from commanders...or should I ?
Sorry my my english