There is an easy solution for the entire problem. At the moment the forrester or cutter LEAVES the number of trees is deducted or increased. This will mean that if an tree has 8 logs and you will send two cutters L5 on them that the first one gets 5 logs and the second 3 logs. But it also means that if you have two cutters and 1 forrester moving towards it, that it will work for that cycle.