Exactly the case. I got shit from some grumpy broad boarding the buque on my way back from Colonia on my first and only trip. I had a dozen stamps in my passport coming in and out of Argentina twice a year and staying for a month on average over half a dozen years, and she had a hutzpah to tell me that I wasn't a tourist but a resident and gotta go apply for a residency visa or I won't be allowed back into Argentina next time, which was a complete BS...But if you hit someone like that, there is no reasoning with them, they enjoy having their power over the rich bastards that can afford a nice life style
. In any situation in this country never forget that common sense, logic and laws do not apply...Overstaying is safer, easier and cheaper, just pay the fine on the way out. Or if you only want 6 months stay at a time, just pay for extension in immigration...