Ok, Lets first check the little lever on your gas regulator to make sure that's not closed. If that brass lever is down, then its fine and the gas is on to the oven. It should be vertical(ON) not horizontal(OFF)
Here's the photo of your gas regulator, see the brass lever on the back right side of it?
If both are glowing orange but NOT opening up the oven gas safety valve every time, then measure the amperage draw of the ignitors. It needs to be 3.2 - 3.6 amps for the oven gas valve to open properly and every time.