BUG: something wrong at pd.Dataframe.from_dict()
#### Code Sample, a copy-pastable example if possible

```python
# Your code here
A = {"a":[1, 2, 3 ,4], "b":"b", "c":"c"}
pd.DataFrame.from_dict(A,orient='index').T

B = { "b":"b", "c":"c", "a":[1, 2, 3 ,4],}
pd.DataFrame.from_dict(B,orient='index').T
```
#### Problem description
the output A ，B  are diffrent 
