Keeping bank transactions in sync
It probably isn't possible to do this robustly.

If your previous sequence ends in:

"01-01-2014", "ABCDEFG", "+100,00", "+1024,56"


and the next sequence begins with:

"01-01-2014", "ABCDEFG", "+100",   "+1024,56"


is that the same transaction as before? Or is the data really:

"01-01-2014", "ABCDEFG", "+100",   "+1024,56"
"01-01-2014", "ABCDEFG", "+100",   "+1024,56"


so you should import two transactions?

Without a timestamp, some useful unique transaction identifier, or the ability to know for sure what point you've already imported up to (say, transactions being split into discrete and non-overlapping monthly statements) I don't think you can do this reliably.