Hmmm. Well, when you have time, check your packages folder and see how many you files you have in there? It's important to check because you shouldn't try to load extra sliders unless you have a hack to allow it - it's going to mess up your game.
If you're confused about which ones are sliders, I would simply delete them and redownload - making sure to label the files as you go.
Even if you have every slider that has been made for TS3, they've only been published by a handful of people, so they are easy to find. All of us here (that use sliders) pretty much use the same ones (By Bellalek/Ahmad, aWT, Jonha, etc.). So we can help you locate the sliders you need/send them to you.
About the slider hack, I'm guessing you did not try to install one? I know it's a pain, but if you don't know what you have in your game, it's hard for others to help. It also means you could easily download something that conflicts.
Also, I would consider patching. I don't think there are slider hacks available that match the patch number you said your game was on.
If you don't want to patch all the way up to 1.39, if you check out Sims VIP here : http://simsvip.com/category/patches/ you can literally pick the patch you want to be updated to.
The launcher does not allow you to "pick your patch" this way - it automatically updates you to the latest one. However, every major mod has been updated to 1.39, so in my opinion, if you are going to update - you might as well fully update.
You can use Sims VIP if you want to bypass Origin/Launcher to install the update. I hope that wasn't too confusing. I believe that the website has instructions with the patch download, anyway.
If your framework - the folder where you are installing your mods/packages is incorrect, your game will not display ANY mods, no matter what patch you are on. Make sure to read this: http://www.modthesims.info/wiki.php?title=Sims_3:Installing_Package_Files and see that you have followed all the instructions.