Apple, If you are using the Frog, you have bromine in a cartridge along with a mineral cartridge inside the well on your tub. Did he show you that? It is on the right side of the tub if you are facing the waterfall. You DON'T need to add chlorine after each soak and I am just guessing that either the service guy didn't realize you were using the frog or he doesn't understand the bromine system.
Don't adjust any other levels until your bromine levels drop. You may need to pull that bromine cartridge for a little while to let the levels drop. Everytime pump #one goes on, some bromine is injected into the tub...so the levels won't drop unless you use the tub and stop adding bromine for a bit.
After you get the bromine levels down to a normal range, you will only need to add shock about once a week..depending on your frequency of use. So bromine is injected by the Frog system and shock kind of cleans up the bromine in the tub so that it can work again to tie up organic materials and sanitize the tub. I had a real hard time getting my water right with the darn frog, but now I love it.
If I were you, I would call my dealer and let him know the information that was given to you...because I think someone is confused or confusing (your set-up service guy) and he needs to get things straight. I have a Bromine 101 sheet that my dealer made specifically for Marquis tubs using the Frog, I have to figure out how to get a copy to you...If you PM me with your email, I can scan it and send it to you (alternately I can fax it).