LynArts07 I'm sorry the pack is working differently than you expected. I also enjoy having certain sims run a business of one type or another. For me, though, my favorite way to do this was in the options that came with Business and Hobbies - probably because I am a big fan of running as much as possible on my sim's home lot, and I play with large, busy households. That's just my favorite way to play.
I have felt that most things in a 'Business and Hobbies' business seem to run more smoothly/easily than the retail store that came with 'Get to Work'. However, if you have your heart set on owning and running a business off-lot, you may want to consider adding 'Get to Work' (for the ability to own and run off-lot retail stores) or 'Dine Out' (if you want to own and run a restaurant on a lot you don't live on). I actually overlap some of the items from all three packs sometimes, depending on my goals on a lot and how each thing functions in another context (which requires testing to see if an item will work on a different type of lot).
I hope you will find there are ways of using the pack you purchased to run a business on your home lot in a manner that you enjoy in the end.