Daniel, are you a licensed applicator? Please ask where the targeted weeds exist before making a recommendation such as this to an interested homeowner. He's here for constructive advise & should be able to inquire with confidence. (G)Roundup is a non-selective herbicide. John (RIPPIN) is talking about his lawn. He could have wiped it out entirely. It's a mew lawn off to a good start. He just aerated, Limed, & applied his first round. And you'd have him kill it?
DO NOT USE (G)ROUNDUP ON YOUR LAWN! YOU WON'T HAVE A LAWN ANYMORE.
Didn't you just wack your lawn with Bayer Advanced herbicide? If so, it takes 7-10 days to show symptoms unless it had 2,4-D in it. If it did, the weeds should have curled in 2-3 days or less.
Your second application on the program thoroughly addresses broadlef weeds. If they're getting out of hand, let me know. I can shuffle the date on the program for you without compromise or dead grass.
Let me know.