[lightmaster]

I have a Kindle Paperwhite and I'm running KOReader on it. When I connect KOReader to WiFi and wirelessly connect to Calibre (Calibre detects it as "Wireless Device: KOReader (KindlePaperWhite4)"), Calibre keeps telling me that there are multiple copies of the same book on my device. I do not use the stock Kindle reader at all, and all formats on it are stored as epub. I can reliably reproduce this issue simply by sending a book that is not currently on my kindle to the kindle twice, then disconnecting and reconnecting to Calibre. Calibre will then tell me that the book exists twice, and when I go to "Remove Books > Remove matching books from device", it tells me that both copies are on "Main Memory" and have identical paths (ie, same exact file detected twice). If I send the same book a third time, and disconnect and reconnect, it will say the single file is now 3 different copies of the book.