This crime would generally be charged as one violation, however there are exceptions. For example, was there one incident of exposure that 2 individuals witnessed, or were there two separate instances? The DA has a lot of control over something like this - they can threaten to add a separate charge if there is not a plea up front. Plus, this type of charge has sex registration complications. You should talk with an attorney right away.
It depends on whether there was a plea bargain or a jury trial and verdict. I would also ask whether there was a PC 1538.5 motion filed in the case as this could be a potential issue that could be brought before a federal court. Good Luck.
The DA's office will almost always give an offer prior to preliminary hearing. This does not reflect how they feel about your case, although if the case is particularly bad, the initial offer may be the best one you get. It totally depends on the case, the individual DA and the policies at that DA office. You should get advice from an attorney on what a good offer would be.
Sometimes a DA will load up a case with prison priors so that they can try to get some jail/prison time out of a defendant. They may try to scare him into accepting a deal early in the process. It sounds like your options are pretty limited regarding hiring private counsel, but if you are able to hire counsel at some point I would highly recommend it.
You will definitely need someone who can devote some time into this case, talking with witnesses and drafting a plan to fight the charges....
Why are you stressing out? Your case will not be filed. You are very lucky as the DA can still file a DUI charge even if you are under the magical .08 limitation. They apparently decided to give you a break, and your attorney may have played a part in that decision. Be thankful - you can't imagine the many problems this decision has saved you from.