J.:
I have to say that I have a similar frustration with our current daycare center. We moved three months ago, and the center in NYC was always fully staffed and up and running, no matter if we got there the minute they opened. There were two teachers in each classroom upon opening, so one was able to welcome the children and one was able to speak to the parents.
Now that we are in CT, her regular teachers don't come in and open her room until 8:30 or so. There is a wonderful teacher in the adjacent toddler room who cares for the early drop offs. But she is all alone, so has a lot to do and I feel that we don't get the morning attention that we need (now that my daughter is experiencing separation anxiety).
What's worse is that even though I pay for the early drop off, sometimes when I come in, we need to wait for a second teacher to come to the room or I need to take my daughter to another toddler room so that they can meet "ratio" of no more than four children per caregiver. I am not suggesting that they should break ratio, but they really should have more staff on duty for drop off. I agree its very frustrating, especially if you have just gone back to work and are both adjusting to the concept of daycare in general.
You might want to start checking in with the daycare center during the day and asking how your son is doing. I called most days for a few weeks after we moved, and they always were happy to fill me in on the days full activities. You might also ask for a written sheet of each days events, which both centers I used provided automatically. I always felt better knowing the details of my daughter's day.
BTW, my daughter seems to love her daycare situation otherwise. I have come in at different times of day to observe and she is always happy and engaged. When I pick her up in the evening she chatters all about her friends at school and her teachers. Its just the frustration of the morning that gets me.