Hi,
You probably need to download the whole genome (NC_000913.3) in order to have access to the features. The NC_000913.3 is a protein, and it does not seem to contain the coordinates of NC_000913.3.
I found a bug in pydna that is now fixed that prevented download of the entire record.
see this notebook, especially in the end:
I will have a new pydna bugfix version up later today.
You can also change the pydna code in "download.py" line 216
rettype = "gb"
into
rettype = "gbwithparts"
/bjorn