Your device is recognized as a media player, in MTP mode, judging from your description. In this mode, Windows 7 has a “device stage” available via the taskbar. Click on the e200 icon, and you’ll see the state of charge listed on your PC.
Win7 is a bit fickle with the newest device, the Clip+, regarding battery level, but as of late, my e280 displays correctly. Go to cross my fingers on that one.
It isn’t unusual for the device to sometimes act “a little groggy” when charging, and take a little longer. There are several factors at play, both the Sansa’s internal charge circuitry, and Windows’ control of that USB port. Sometimes, it’s possible that the charge current may be limited on that port- full current (500mA) is available on a USB 2.0 port.
Have you experienced Windows’ trick of giving you a message, “this device may function better on a USB2.0 port”, or something simillar? I get this message occasionally, despite happy joy joy status in the Device Manager, and all of my ports on this machine are supposed to be 2.0 capable. Running on a 1.1 port, your current may be limited.
I don’t like USB hubs unless they’re powered, giving the Sansas plenty of current. I always seem to have a few of them charging together.