I have re-read your question and you seem to have too many decimal dots in your lat longs. OSM just uses degrees and decimal fractions of a degree like the following permalink so your numbers should read 52.25794 and 5.15097 note no minus sign which would be west of the Greenwich Medridian. I wonder if you have confused degrees minutes seconds on the garmin which is a poplular lat long read out with OSM's degreees only which I certainly think is easier to use. http://www.openstreetmap.org/?lat=52.25794&lon=5.15097&zoom=18&layers=M which seems to be close to your most recent edit. hope this helps a bit.bit. EDIT A bit more info 52.25.794 and 5.15.097 degrees this the same postion as 52.15.464 and 5.09.049 degrees and minutes and minute decimals. I just created them as two separate marks on my Garmin vista HCX and one was under the other so problem solved.

I have re-read your question and you seem to have too many decimal dots in your lat longs. OSM just uses degrees and decimal fractions of a degree like the following permalink so your numbers should read 52.25794 and 5.15097 note no minus sign which would be west of the Greenwich Medridian. I wonder if you have confused degrees minutes seconds on the garmin which is a poplular lat long read out with OSM's degreees only which I certainly think is easier to use. http://www.openstreetmap.org/?lat=52.25794&lon=5.15097&zoom=18&layers=M which seems to be close to your most recent edit. hope this helps a bit.