Elphyrafire: Your LO is still good to go for 2 1.5 hour naos and a 45 min catnap. I am not so much shorter nap in the AM as I am shorter A time. at 5 months when my DD got up for the day she was back down within an hour. She still is sometimes. This mornign for example she was up at 7:30 back down by 8:3-0 and was out till 11. I'll probably not get much of a PM nap from her. Your naps do seem to be in order though, good times, and lengths. DO you wake him after 1.5 hours or does he wake up himself? If your waking him, try leaving him see how long he'll go. For your PM nap you can try doing a longer nap and no catnap, though he'll probably want to go down earlier or bed. However, I'd suggest you try to move that nap up 1/2 hour to 1 or your LO will be up to long. I'm not sure if he'd be ready to drop the catnap yet but you can try it. Now your LO is only getting 4 feeds per day, how much does he take at each feed? an increase may be in order. What are the times he wakes? are they always the same? or close too? do you feed him at all at night? whats his mood when he wakes? do you leave him if he isn't crying?
UNCMomma Your LO is still quiet young and shout proably be on a 3 hour EASY. I would worry about night waking just yet, they're normal for her age, most her age have 1-2 waking regularly. Short A time is better for her, at that age no more then 40 min A time (including diaper change) Aim to have her down within an hour of being up. Have you tried pat/shush for resettling? also put your LO down 10-15 minutes earlier then you currently do untill you find the time that suits her best.
HTH