last evening, i was on a long straight in for rny 36, got a caution wake turbulence while i was 8 miles out for a departing big iron from rny 36. got me a little off-guard as to why do i care about his wake since i wasnt going through his flightpath, unless i am going around. got one more about 3 mile final as another big iron fedex took off. I have always gotten the warning if i am taking off right after a big (very rare occurrence for me since i just proactively wait, or roll way past their take off point before my take off) one or even in the air if i am climbing and they are descending but this is the first time i have been issued that warning not once but twice while i am landing and they are taking off. if it matters winds were 040 @5 on the surface, about 060@15 where i was on the glide path and rny 36 was being used. thoughts?