I’m not against casting more than one spell, each of them having specific functions to help manifestation. However Casting more than one spell without proper understanding of how you intend for it to manifest can indeed cause issues with your spell by unintentionally getting in the way of itself. Think more along the lines of properly preparing a single spell, and how you intend to feed that spell through however many days you are prepared to “work the spell”. By observing any new info. on the subject of your aim “Fine Tuning” your spell helps it along also.