Hi K.,
The fact that your 1 year old is up before 6 a.m. would be a big clue that he needs less sleep during the day. I don't know what his nap schedule is, but I'm guessing he is sleeping too late on his second nap. At a year old, this is typically the age where they go from two naps to one. The nap often becomes longer than one of their other naps, so if a child napped from 10:00 to 11:30 and then from 2:30 to 4:00, his new nap might be 12:30 to 2:30 or 3:00 - and he'll probably sleep later in the morning.
I would not worry about matching the naps. At 3 years old, many preschoolers give up their nap. Now, as a SAHM, you might want to still have "quiet time" for the older one, but if he's not napping, he can follow the baby's schedule. My older child stopped napping just before she turned 3. My second child napped until right around the time he turned 4.