Transaction Timing Difference with WPM

Greetings,

I am new to WPM and currently running a POC for transaction monitoring. I notice there is a big difference in timings with regards to playing the recording manually and having the WPM server execute it. Example: Running the recording manually on a PC player yields ~31 seconds and when WPM triggers it, 162 Seconds. Would anyone know the reason for the difference? Also does SEUM play all the recordings at once?

Thanks in Advance.