One of my major bank stocks has split 2 for 1 and I have entered the split information in the Splits dialogue. Initially prices were adjusted accordingly and all looked well. However, when I have started adding post-split prices there seems to be confusion in the prices from the two months before the split. Prices in this period (Feb 22-to May 12) have been doubled (up the split date May 13) again as if there had been another split.
I tried deleting these prices and reentering them but when I enter an $80 post-split price it is recorded as $40. Part of the confusion may be that these prices were updated using the historical quote server.
What should I do to smooth out the price profile?