If it were mine and i'd paid a garage to fit them, i'd take it back and get them to fit them correctly and cover out of pocket costs to.
As it is now, there is a chace that the prop to VCU joint could loosen as the bearing isn't being clamped through the inner bearing race. This is because the convex washer is pressing into the bearing dust shield. In time the dust shield will collapse causing the bearing to fail anyway. The thrower is an integral part of the bearing protection assembly, It helps protect the bearing from road spray, dust/ salt, as well as off road water and mud!! Getting the bearings refitted correctly should do less damage than leaving them as they are!!