If you read the OP you will see that rastaman answered the first question in the first line. He then corrected a few assumptions by the OP and then corrected Phil. He never answered the OP question on arrows on ST because there is no published answer.

He can say Phil was wrong because Phil used the word SLIGHTLY. It does not do anything slightly. It makes the player play in the position ahead or behind his normal position depending on the arrow. This is confirmed in ask the devs.

See it as rude if you want but rastaman is correct.