Dodgy formatting on looped table

Everything else I've ever come across is boring compared to this. It doesn't affect functionality of the script, it just makes what i'm doing completely incoherent for a user. I've got a working datasheet set up. It works, I'm happy. Its set up inside a layer, which is positioned, absolutely at 15px from the top and 17px from the left (or maybe the other way round, i forget). When i run the script, it displays the contents of the database nicely in the table. Updating works dandy. But the table sits in the middle of the page. For every row in the table, the layer seems to be a row further down on the page. When i add a new record, the table drops another row, and a nit further (a few px) to the left. When I highlight a row in the table, the row highlights, but so does the line which corresponds to that row in the gap above the table. Myself, my dad, my boss, and a co-worker have all checked for errant line breaks or the like, and there are none. Does anyone have ANY idea what the hell is going on? Or might be going on?