I'm not I understand your question. You mean you accept the quest with your main but your alt doesn't or that it says he accepted but it doesn't show at all? If that is the case, not that is not supposed to happen. When you accept a quest with your main and your clone accepts the same quest, you should be able to see it in each individual quest log. try getting an add-on for quest. I use monkey quest and it quite useful. MB v2 also gives you a text in the UI whenever your clone has accomplish a quest or portion of the quest.