So ten second runoff wouldn't have been enforced on first SEA penalty because clock was already stopped by a SEA timeout. This false start penalty stops the clock on the play prior to the holding penalty. Holding penalty doesn't result in a ten second runoff because again clock was stopped due to the previous false start penalty. Might be off here but this is my thinking.
A running play has nothing to do with anything. SEA takes a TO. Gets a false start penalty. Enforced. No Play. SEA runs another play. Holding penalty. Enforced. No play. Clock never runs. No runoff.
That makes no sense... again hence the word "flaw" in the rules. So if no penalty is called, the clock potentially runs out and Seattle doesn't even get another play off. However due to a penalty they benefit and get a FG attempt. The penalty BENEFITED them. Again I dont care what the rules state, its a FLAW in the rules. You should NEVER be benefited by a penalty.