i have a buddy that is the SAME way...he cant track an arrow to save his life...even on a target...
shoot with both eyes open and shoot bright and/or contrasting fletching colors...2 green 1 white, 2 green 1 orange, and 2 yellow and 1 orange work well for me...my buddy shoots 2 green 1 orange..my old colors...the other shoots 2 green 1 white...my previous colors as well...i went to 2 yellow and 1 orange just to have different colors lol...but both have troubles...1 cant do it at all....i can stand behind them and track THEIR arrows...
but both close 1 eye...i think thats alot of the problem...the rest is probably lack of focu...they can hit a target and typically shoot decent...but i can tell their follow through and focus isnt there...pick a spot, leave both eyes open, focus on the shot and let the arrow go...your going to see that arrow if both your eyes are open and your focused....
i quit using lighted nocks when i realized they were more trouble than they were worth and i could see my arrow just fine without them....after i said id never hunt without them when i wasnt able to see my arrow each and every shot...
shot my buck at MAYBE 5yds this year...watched the arrow fly and strike right where i sent it...that was on a buck moving after i watched him at 10yds for 5 minutes and was pretty shaken up...i dont know how i had the focus to track the arrow...guess because thats how i been shooting for a few years and its all 2nd nature like my form from shooting so much...
work on it...i believe it'll come if you try shooting with both eyes open and picking a spot and focusing on it...even AFTER the arrow is let loose...alot of guys have a tendancy to not follow through as they are in a hurry to see where they hit..especially shootin deer...oh..use a wrist sling if your not...thats what REALLY helped me follow through...when i went to the wrist sling is when my follow through got good and i could really track my arrow...i had a mental fear of dropping my bow...so bad i death clinched it as soon as i touched the release...my shooting suffured from that...a good follow through, you can feel and watch the bow recoil in your hand...its kinda neat actually..