@Trisha998 Your sim's lifetime wish tally could also be reset if you played another household within the same save, as in, you went to Edit Town, clicked on another house, made that the active one and played it for a while, then went back to the private investigator. The game doesn't seem to keep track of these numbers properly, or at least not all the numbers, and not all the time.
The mod to reset the tally is called NRaas MasterController. You would need the base mod, plus the add-on Cheats module. The way to change the number is to click on the sim and select NRaas > MasterController > Advanced > Lifetime Wish: Change tally, then enter the number you want.
While you're at it, you may want to use MC to reset the town. This helps prevent save corruption and is good practice in general; many players run the reset every few sim-weeks. To do it, click on City Hall and select NRaas > MasterController > Town Options > Reset Everything. This will reset your active sim as well, and restart their dream manager, unless you exempt your active household from the reset (City Hall: NRaas > MC > Settings > Include Active Lit in Reset Everything > False).
If you're not sure how to install mods, here's a useful guide:
http://modthesims.info/wiki.php?title=Game_Help:Installing_Sims_3_Package_Files/Setup_and_Files
Be sure to delete the five cache files in your TS3 game folder in Documents\EA any time you add (or remove) a mod from your game folder. They should be deleted regularly anyway, whether you're having issues with your game or not. For reference, the files are:
- CASPartCache.package
- compositorCache.package
- scriptCache.package
- simCompositorCache.package
- socialCache.package
