Did You Know??? (pending orders)

Did you guys know that...

1. You cannot place pending orders very close to the market price. Most of the brokers have minimum distance of 3 to 10 pips.

2. You cannot expire an order before ten minutes.

This is so frustrating. I really don't understand why these pip distance and time distance rules. Can somebody please explain why.

Also to me the first rule means that you can never really very cleanly place an buy order one pip above/below the close of the last completely formed bar. Any ideas to beat this first rule with a smart program????

Regards
Brijesh

I was reading some articles on why the distance in pending orders, and as I can understand it is done to reduce scalps.

But what I don't understand is why should they do it. Especially because if the trade is between two traders and all the broker need to collect his brokerage what is his problem.

Does this mean that most of these brokers are directly trading against you???