Yes this is very common. The first test at the car is a PBT (Preliminary Breath Test). There are numerous types of machines that police use for this test, they are notoriously inaccurate, which is why as Attorney Lewis said they aren't admissible against you for guilty or innocence. However the test at the station is an Intoxilyzer 8000, and is admissible in KS as long as the proper procedures were followed. Consult a local attorney to discuss your case in more detail.
This will be treated as your first as long as you don't have any priors on your record. Contact a local attorney. Johnson County District Court is one of the worst places in the state to be charged with a Domestic Battery case.
I recommend you contact a local attorney as soon as you can. By Deferred Judgement Program, I assume you are referring to some type of a Diversion program, which would avoid jail time. However, you should consult an attorney to review the facts of the case against you. There is a possibility you would have a case you would want to take to trial. Best of luck.
Contact an attorney who works in Kansas City, Kansas courts as soon as possible. If you just owe money, it will likely be a simple process, but they will be able to find out from the court what you are facing.
Contact a local attorney in your jurisdiction as soon as possible. The DA does have discretion as to when to prosecute cases, but the process can be helped along if you have an attorney representing you.
Contact a lawyer immediately, and only discuss this matter with them. As both the other attorneys have stated you do have some options since it is your first time facing criminal charges. This is a serious offense, but it is likely that with an attorney's help you will be able to avoid jail time completely.