Ghost basket increasing itself

[tuttocartoleria]

Hi, I hope my english is not too bad. It's happening something strange in my e-shop. It's about 3/4 days that a basket increase more times in a day. The products are choosen from each category, about 5/6 for each one, always 1 peace. When I discover it i cancelled the basket, but, after 1 hour it comes back once more and it stars increase any more. Do you know what is it? I'm not to quiet about it.

I forgot... I don't see it in Google Analytics.

Thank you very much.

Edited June 30, 2016 by tuttocartoleria (see edit history)