Hi, I've got a 550' deep well that produces 7.5 gpm consistently. What I notice recently is the recovery on a 40/60 when pressure switch hits 40, pump turns on, i turn off usage and it reaches 50 in one minute and then it takes 5.5 minutes to cut out at 60. Is this normal? It's like the pump is starving at increased pressure or something. Thanknyou for any reply.