She's gonna have trouble with the sit command with a mini-dachshund, LOL. But I know what you mean.
This sounds a lot like a case of a dog that's making up rules and enforcing them. And I had no idea the Dachsies were considered "controlling" as a breed. I deal a lot with this, with BCs and Aussies (Aussies are absolutely the best at this). It's the dark side of a personality that is clever and has a lot of internal resources.
Anyway, the game is called, "I'm Going To Make Up a Rule and Then I'll Punish You If You Can't Read My Mind."
The tool to combat this game is offering her a bit more structure in her life. Don't just tell her what she can't do, make sure she's got a lot of things she can do. And, start making her life a lot more predictable - or as much as possible. I know your life is a bit chaotic right now, but try to make sure mealtimes, play times, and walks all occur at the same time each day if you can.
An immediate fix for the behavior you've got going on there, is to remove her any time she "takes matters into her own hands." Since toy breeds crave attention and physical closeness most of all, doing this means there's no payoff for bad behavior.
Again, I recommend Deborah Wood's book for toy dog owners - it should be required reading for all of us who live with mighty mites. She outlines a positive approach for manners training and specifically addresses some of the behavior issues that are specific to
little dogs. I'd direct you to the section on controlling "armpit pirannhas." 
Becca Shouse
Maggie and Zhi (queen bees), Ben, Gus, Cord, Rocky, Ted (BCs), Lu and Tully (Maremma flock guardians)
"Protect, Herd, Love" Irena Farm, Semora, NC
"We didn't have a phone, and we couldn't call you!" Helen, AIDS orphan. Don't let them die of ignorance - WorldHelp.net
"I-Dog Biggest Loser" Official Cheerleader/Mascot

Start 09/15/08: 186.4 lbs Current 185.5 lbs