Oh, this question has plagued me for years.
I think you can definitively say that Marco and Peter weren't living in the same house they lived in when Eva 'died'. After all, in #10 (the last time Marco mentions moving), he mentions that they're in a house 'like' what they used to live in, rather than the cruddy apartments they'd been in before. So the number was undoubtedly changed.
The only explanation I can come up with is that V1 figured she might need it and looked it up between #30 and the trial. We don't know everything that happened between those two points or how long a time period that was, but it was at least several weeks, so...maybe? I really can't think of another answer.