25" seat tube is probably long enough it would never happen, but you might take the bottle cage screws out to make sure that the stem wasn't one of those super long ones someone might have put in there as a replacement and later wound up screwing the bottle mount screws into it. (I do hope my english teachers never see this run-on sentence)

Nice bike though. I've thought that I'd like to have a Bianchi many times before, but the right one never turned up. So if you want to send it this way.......................................