After reading this thread I'm so tempted to upgrade my S1 just to gain the swimming option. Ideally I wanna hold off for Series 4. But my new apartment complex has a nice 25m lap pool and I've been using occasionally and being able to accurately track the swim would certainly be nice/motivational (I still swim with it now, just using a generic workout). The auto pace/stroke/lap/style features would be pretty handy...
Jervasio, are you sure that something like this...
...isn't what you are experiencing? Meaning a "bonus" lap shows up later, because it hadn't marked your last lap yet? Or do you actually count your laps and the watch is consistently giving you an extra one? I'm not sure how that would work considering it shows the pace for each individual lap.... Does it say you completed a lap in like 1 second?