Decoding a 433Mhz OOK Signal

Hey, I recorded a wav file using sdrsharp and used rtl_433 with the -A function ([-A] Pulse Analyzer. Enable pulse analyzis and decode attempt) to decode the signal

when I look at the wav file from sdrsharp using Audacity and compare it to the output from rtl_433 they do not exactly match, the red section in the screenshots…
can someone explain this?