One possible reason why during the sacrament the bread is blessed and eaten before the wine is blessed and drank is because until you make the bread [word/law] part of yourself, you will not enjoy [wine] nor appropriate the atonement [wine]. Bread in the scriptures represents the word, and Wine represents joy and the atonement. Wine is living grape blood. And because of the blood [life] of Yeshua/Jesus we can have joy.