Hey Patrick,
As the actual size of the vmdk is 66GB then while its importing it has considered the whole disk and shows like you have a large disk, also shows you to in the disk management.
-Well here you have 2 options. 1st you can ignore it and start using as it is.
2nd is that is you would like to have the exact amount of disk as it is consumed, you can use VMware vCenter Converter Stand alone. In this converter you have an option to select the hard drive space Data to copy >Click on Edit >Under source volume >Destination Size > Select as minimum and convert.
(Screen Shot Attached)
-Hope this helps you.