Sorry so long getting back
Windows recognizes two forms of partitions Primary and Extended
Only Primary partitions may be made "Bootable"
You can only have a maximum of four Primary partitions per drive under windows, with any additional partitions having to be non-Bootable Extended partitions.
Fortunately for addicted Multi-Booters like myself
, windows will get round this limitation by the method that all post XP Windows Operating Systems will use the same boot partition in a multi-boot scenario. As long as the first OS installed is on a primary partition the it and any laster OS's will boot without issues.
It is possible using a 3rd party tool to alter the type of partition without destroying you data, and if setting up a system from scratch I would probably try to set each OS to have a primary partition. This is howerver not required so I would not advise you to change anything as long as your system is working.
Making the drive "active" sets it as the primary boot partition so it is not possible to make a Logical (extended) partition active
Hope this clears things up for you