GloriaRose Creations

I might be reading to much into this but.... The movie starts in the 80's I could be wrong but why does Bee look like a Camaro and Prime look like a truck on their home plante??? Like I said, I could be wrong but in the very first movie Prime saw the truck drive by and thats when he transforms into it.... It was a big part of the movie. Everyone on the planet looks like something from Earth WHY??????? And how come everyone knows where Earth is?? I'm so confused