DE 1.5 and 1.6 does not store the last position correctly

Hi!

I've seen this problem in DE 1.5, now I tried to install 1.6 and I see the problem is still here.

I have some DRM-protected ebooks on my laptop. I open one of them, read, close on some page (for example, 162). Then I open another ebook, close it. Then I open the first ebook again and the position is 163-th page, not 162. Close and open again, the position is 164. And so on.

I expect DE should store the last position without any "auto next page" functionality. Could somebody say me what is wrong here? Or, perhaps, this a bug of DE...