#GPS errors

tbh i’m embarrassed to admit this but my ‘tech-savvy angler’ vibe is total bs?? last week i tried tracking my kayak casting drills with the garmin 245 in ‘running’ mode because i was prepping a paranormal talk about ‘water spirit movement patterns’ and needed split times... the thing logged my 150m paddle sprints as 8-minute mile pace ??? my actual heart rate was through the roof but the watch thought i was powerwalking?? anyone else force-fit fitness gear for dumb projects?? i’m 90% sure this is why my ‘haunting cadence’ slides are garbage rn