i have had 5" t&g pine floors installed. the finisher sanded the floors with 36 paper, then followed with #100 paper, then used a buffer with a screen pad of some sort to finish up. he then applied the stain to the floor and it looked like a tiger stripe across the width of the planks. needless to say, i am not pleased. the edger used against the base boards runs circular, the stain at that area is uniform. what caused this difference in the stain?