My car has no jerk or motion when I stop. I do notice a very, very slight change when the brake regeneration kicks in as the car slows and then shows no gas usage (which is impossible). This car is the smoothest I've owned.
From your description, a dealer checkup might be in order. Ask to try another car from their lot.
2012 BMW 535i X-drive; Space Grey/Black Dakota, Fineline; Executive (Auto trunk, NAV, HiFi Prof, Lumbar, Rear Cam, SIRIUS, Voice), Technology (Blind Spot, Hi-Beam Assist, Lane Departure, Surround View), APPS, Rear heated seats, Tint.
Retired: 78 300D, 81 300SD, 87 190E, 88 Porsche 924, 89 260E, 93 300E, 97 Volvo 850, 98 E320, 03 BMW 325iT, 02 C230 Sport Coupe, 08 BMW 535i