Can grafts that contain 2-3-4 hairs be split into several ‘one-hair grafts?

When grafts are split into smaller grafts, it should be done under a microscope. Great care must be taken to be sure that the growth centers in each hair is identified and moved with the split grafts

In patients who need more single-hair grafts than occur naturally in the donor area (this is less likely to be a problem with FUE than with strip harvesting, since the former allows single-hair grafts to be be "cherry-picked"), multi-hair follicular units can be split to produce single-hair grafts; however, this is considered somewhat of a last resort, since many surgeons believe that the follicles in a multi-hair follicular unit are more likely to survive and grow when that follicular unit is kept intact. But I wouldn't get too hung up about the details of the graft count--it sounds as if your surgeon was aware of your concerns and determined to give you a natural looking hairline. Try to be patient, give your surgeon the benefit of the doubt, and wait to see what the next few months bring. If worse comes to absolute worst, you could probably have your hairline softened with a second procedure.