I can probably help with this.
DS started Childcare, two days per week (in Australia) from about 10 months. He had a very strict sleep routine at home (due to us going to a residential sleep school at 4 months - best thing ever!), where he was allowed to grizzle for a short while before he would self settle and sleep and the room was completely blacked out. Childcare was completely different. Babies were put to sleep based on their personal routines, but most of the time the carers rocked or patted them and then put down. Otherwise if they cried while in the cots they might wake other children. It was also not overly dark because of rules about needing to be able to see in and out at all times.
DS has always woken between sleep cycles, and puts himself back to sleep very easily after a 5-10 second mini-cry. But, I think while he was at care he was either attended to very quickly, or because it was light could see the other kids and so didn't want to be asleep anymore. So consequently, he was having between 10 and 45 minutes sleep all day instead of the 2 X 90min on a normal day at home. The poor kid would be so tired at the end of the day half the time he would fall asleep on the way home. We would quickly try to feed (he did get a late snack there at around 5-5:30pm, so didn't need a full dinner), bath and straight to bed.
As others have said, after a while he did improve, but it was never great. On his best days he might have had 1.5hr, but that was rare. I think it's just one of those things about Childcare, especially for kids who haven't been there since they were really young so learned to sleep in that environment.
At the end of the day, he wasn't suffering overly from it, he was kept busy at care so not getting too cranky there and we just changed our routine a bit at home to suit.
At the centre, you can ask them to keep trying to put your daughter down more often and see if she gets used to sleeping in the cot. I think you should do that at home as well. Depending on how many days per week she is there is how much it would worry me.
Also, in response to others, sleep needs of children differ a lot! DS is now 17 months and we have only dropped his second sleep (was still 2 X 90 mins) this past few weeks. He now has 1 X 2hr after lunch.