Kid......you were guilty in an abstract way,and you know it too. You just didnt actually get caught. You could get your record cleared but it is gona cost big bucks.
the probation department was wrong also for threatening you with another charge if you didnt plea to the first one. This is called intimidation/extortion. Had you mentioned this in court,you would have walked,and the probation officer would be in jail/unemployed.
A cop did this to my girl-friend once,and with-in thirty days he was on the streets s a civilian.
Police lie on reports,probation officers lie on reports,both make the situation look worsethan it really was in order to get a conviction. They both know that the procicutors office is going to plea-bargain every case down,so they increase the report,and tack on B.S. charges in order to assure you get the time/fine they originally wanted you to get.
For a good example: lets say you crossed a center line and got pulled over. The cop nails you for D.U.I..
When you go to court the report wont be a D.U.I. charge alone,it will say you were observed crossing the line SEVERAL times,and the officer smelled a HEAVY odor of alcohol. You'll be charged with D.U.I.,travelling on roadways laned for traffic,crossing the center line,wreckless driving,wreckless endangerment to yourself and others,,and public intoxication(you had to get out of your car to take the test).
The entire system is corrupted this is why I spend a good amount of my time fighting it. In all honesty,some real scum-bags that need locked away for life,end up walking,because of loop-holes in the law,but many more minor offenders get slammed with major time,and fines for the same reason.