multiple ea's running at once

I've got a few different ea's (the same ea with minor changes for the different tf's) running on different time frames of the same pair. I've written the ea's to only open on order at a time which is working, but I've noticed that if an order is open from one time frame, no orders will be opened from triggers on the other time frames.

My question is, how do I keep one ea from reading the orders opened by the others?

You might try giving each EA a different magic number. Then tell each EA to look for trades with only its own magic number so that the other EA's don't read the same trade.

so if EA #1 has a magic number of xyz321 then when you tell it to loop through the orders, have it match on the magic number
int cnt
for(cnt = OrdersTotal(); cnt >= 0; cnt--)
{
if (OrderSelect(cnt,SELECT_BY_POS,MODE_TRADES))
{
if (OrderMagicNumber() == xyz321)
{
Place your command here
}
}
}

Hope that's of some help