Never trust websites or programs like this. They find out the BPM with an algorithm, but it's not correct in most of the cases. If you have multiple BPMs or broken numbers (for example 172,75 BPM) they won't work. Also, they can't find out the correct offset which is much harder than finding out the BPM in most of the cases.
If you need a Timing, try to do it yourself by checking it while listening to the song on 25% speed, or ask an Expert for help if you can't do it on your own.