That's normal for cuttings. They are ideally 1 year old wood, so some of those buds are always going to be flower clusters. 101-14 isn't sterile, it's female. It requires a pollinator.
But, any fruit set on a 101-14 will absolutely be a crossing of it and whatever parent pollinated it.
All grapes set flower clusters, but some varieties are perfect flowered and self pollinating, some are male (3309C comes to mind), and some are female (101-14 MGT, 1616C, LS-50, MN1047)
Just pinch off the flower clusters as soon as they are big enough to deal with, as they sap energy that the cutting needs to use for roots and shoots.