Explorer not recognizing size of optical drive disk

I have a blank 4.7 Gigabyte DVD +RW in my DVD burner. When I go to Explorer
and click on the E: drive (that's the letter for my DVD burner) it
recognizes the drive and a label I gave the disk. I did burn a file to the
disk, Explorer recognized it and ran it from the disk. I then erased the
file.
However, when I right click on the drive letter in Explorer and check for
"properties" it shows a capacity of 1.99 MB and also lists the "used space"
as 1.99 MB and the "free" space as zero. When I go into my burning software
that came with the computer (RecordNow! by Sonic), it properly shows the
size of the blank disk.

Why isn't Explorer in my XP SP2 properly reading the size of this disk in my
optical drive?

And while I'm here, related question: Is there any tool in XP that would
allow me to use this DVD +RW just as if it were a floppy? In my old Windows
98, one could do this with a CDRW but only with packet writing software (I
used to use InCD) loaded. Does XP require this type of additional program
to use DVD RW's as if they were a floppy? I don't plan on doing this but
I'm curious.

Thanks.

Chet