Stovetop ignitors

I have a whirlpool stove model sf387legq1 and the left rear burner was not lighting. The spark is not strong. I ordered a new ignitor for it. However, after turning off the gas, I was checking the spark and when turning any of the 4 burner knobs to "light" all 4 ignitors are sparking together. This is not normal is it?

normal see it all the time

Ok. Thank-you.