SMDM Pilot Movie query

I have just obtained the SMDM Series 1 set including the 3 prequels. I notice that the first movie has a runtime of 74 minutes whereas IMDB lists it as 90 minutes. Has the pilot been cut or is the IMDB runtime incorrect? I have come across this before with TV movies. The IMDB runtime is the runtime on TV (presumably including ads) and not the actual movie runtime. Can anyone confirm this? Thanks