In some cases you may need to change your actual split date slightly. TradeLog uses the split date entered in the Adjust for Stock Split window to determine how many shares were still open at that point in time. If you had post-split trades for the ticker you're working with on the date of the split, you will need to use the previous day's date in the Adjustment window.
If you do not, TradeLog will assume that the only shares that need adjustment were the ones still open at the end of the day on the split date. If there were closing records on the split date there may be no shares open at the end of the day, in which case TradeLog will not adjust any of the records. If there were opening records on the split date these will be adjusted for the split even though this is not necessary since they are already post-split.
For example, take a look at the trades below:
Open Shares: -162
On 1/18/2008, John bought 325 shares of CRDN. A "3 for 2" stock split occurred on 1/19/2008.
Also on 1/19/2008, he sold 487 "post-split" shares so at the end of 1/19/2008 he did not have any shares of CRDN still open.
If he ran the Adjust for Stock Split function and put in his actual split date of 1/19/2008, no adjustment would be made.
However, if he made the adjustment using a split date of 1/18/2008, his pre-split shares would be adjusted for the split.