The default origin point of the grid is 0pix,0pix. You can change this value to anything you want, so you could, for example, set it to 0.8pix,0.8pix. The rest of the grid divisions should space equally from the origin. This would allow you to align your text to the grid and keep it spaced the way that you want.

The option for changing the Grid origin is under File->Page Options. In the dialog that opens, choose the tab titled "Grid and Ruler"