What's wrong with CoM tasks selection?

Why do I get time by time the same tasks? Even if I scip some tasks they shortly appears again and again and again. While some other task can appear just once a week (collect money) or even once a season (golden keys). But depot extension can appear 50-100 times a day. Does it a difficult thought that i am not supposed to get enough items for so fast extension? Does it difficult thought if i scip some task I really don't wanna get it again right the next one? Years ago there were so many different tasks every week, but now it seems I need to do the same 10-12 actions every day. Does it really impossible to program (if/) a task was skipped (than/) chose any other that haven't been chosen before?