I would have thought 2400 for your busy life might be a bit low - however instead of taking a full fitness break maybe eat at TDEE for a week or so - we are supposed to that anyway every so often to make sure how body isn't resetting our TDEE lower again

if that gives you way more energy then you can say that you probably should be eating more

and yeah repair and rest!! good points above

Oh yes you do have to manually log some exercise, read Fitbit's site on activity it is NOT good at estimating, because it's not step based.

Your TDEE is under-estimated because you don't manually log your strength training, and that counts a whole lot more than Fitbit is giving you credit for.
Ever look at the steps and calorie burn during your lifting workout? Very low compared to reality.

You need to go back to a test week and log your lifting as Strength training. It may seem low compared to cardio, but it's better than the nothing you are getting.
That will give you a better indicator of TDEE.

Since I'll presume you are wearing the Fitbit to improve accuracy of TDEE estimate, if so, wouldn't you want it more accurate if possible.

Also, as others are pointing out.

Exercise if done right tears the body down.
Rest for repair and recovery is what allows it to be built back up - stronger if diet allows.

Just to confirm - where is your rest?
Add to that, recovery is impaired in a diet, takes longer and you of course don't get the stronger part nearly as much as eating in surplus.
It's good to see you space out the lifting workouts, and the classes are probably not nearly the workout they used to be, efficiency of movement and what not. But I wouldn't be surprised if they are impacting getting a good lifting workout in.
I figure, if you are going to spend time doing the lifting, why not do it best for best effect?

Might want to think about your focus, because your TDEE is going to go up once you have lifting entered in, and if you can hit that goal, that will help with recovery. Probably not enough though. You'd probably be shocked at the improvements you could have been making with a different laid out workout schedule.

To clarify do you mean to add lifting on the fitbit website or add to MFP and eat back those calories. Just want to be sure. I don't get enough rest because I am so busy with my children/work etc but I like to lift/run as that is my me time. I have decided to drop the body revolution and the Sunday yoga so i have a total rest day. Also if I am really busy like a night shift I will skip working out . I do tend to prioritize working out over sleep which I know isn't right. As I said lots to learn. Thanks for the advice will mull this over throughout the day.

When you have it synced you add them on MFP, and you replace their bad estimate. Then of course that is accounted for so in essence yes you will eat them back to maintain a reasonable deficit.
But you mentioned unsynced now, so just add them to the Fitbit site as weight lifting - then you'll have to decide was it an easy maintenance type lifting, or it was actually hard for you power lifting type lifting.

But I thought you were merely trying to find your TDEE level, so doing it on the Fitbit site should be enough to see what the adjusted TDEE is.

And so true on sleep, since that is major time for repair, and lack of it just adds stress.

So with lack of sleep you have that stress, and then you have badly recovered workouts that end up just being more stress to the body.

At least your lifts are spread out so really a chance for recovery.

Question on that though, have you been lifting for a couple years to do an advanced program like one body part once a week?