Thank you for all the advice. This is what I have learned. I was mistaken in thinking that the tanks were like a septic system....nope, just a holding spot. I also learned that the smell was from not dumping weekly t every week and a half....since it just sits there, it brews. I also have learned that the chemicals are for helping with smells for up to 2 weeks at a time...MAX. And I have learned how to flush my tanks!
I drained everything last night and flushed out the tank about 3 times and then set it back up with fresh chemical. That took care of all the smells! It now will be on schedule to dump every week as long as we are living in it.
Thank you for all the advice and educating me on how the tanks work and how to care for them!