when naps are dropped?

[seesawbaby]

My dd is 20 weeks.  Our EASY is going awesome, although I'm not sure when they transition from three naps to two.  Here is our routine:
Wake 8:15
E 8:30 (rice cereal and 5oz bottle)
S 10:15-12:15 (sometimes this ends up being longer but never any more than 2.5hr)
E 12:15
S 2:15-4:00 (this nap is usually a little over 1.5, especially when the first nap was longer)
E 4:15
S anywhere from 5:45-6:00 only 45 minute catnap
E 6:30
Bath 7:45
E 8:00
S 8:30 (on a good night, sometimes it leans more to 9 after she done babbling or whining)
When they drop the late afternoon cat nap does bedtime move up or stay the same.  I tried moving bedtime up to 7:30-8 when she dropped her early evening catnap but she still didn't want to go to sleep until after 8.  all her bottles are 5ozs.

[hjrmom01]

I've only got a second to post but if you reply back with any questions it'll pop up to me tomorrow and I can post more!  

As your lo starts to extend A time the CN will decrease in time.  In order to drop the CN A time has to be around 3 hours.  When H was dropping the CN we'd have days where I'd just have to APOP a quick 10-15 min nap to get us to bedtime because our A times or naps were just a bit too short.  So as your lo starts approaching 2.75/3 hrs your CN will become nonexistent.  Make sense???  

And sometimes your bedtime may have to be moved up a tad until your lo gets used to not having the CN...but it shouldn't have to be for long!