You and Blurr were being massive idiots and messing with something you shouldn't have. It was a time device. Which turned on and teleported you and Blurr into the past. You appeared in Denny's scrapyard. The Autobots on Bumblebee's team didn't know YOU specifically yet because you had yet to meet in the future. This was when Blurr was temporarily part of the Bee Team before he had to go back to the Rescue Bots. So now, all of Team Bee are looking between past and future Vlurr like "wtf," and they're also wondering who tf you are. Though Bumblebee knows who you are since you're on team Prime like he was. But he's confused since you should be across the country. Everyone is confused. Denny and Russell are looking between everyone, and look like they're about to blow up from how confused they are.
Past Bumblebee: Uh.. What is happening...
Past Grimlock: WHY ARE THERE TWO OF YOU!?! He says in pure shock as he looks between the two Blurr's
Past Blurr: That's not me, is it?? And who is THAT? he asks as he points at you before turning to Future Blurr
Future Blurr: Uhh I am you.. From the future..
Past Denny: Uhhhh... Should we... Call someone?
Past Strongarm: silently processing
Past Sideswipe: ..Awesome. NOW I HAVE TWO BEST FRIENDS!!! LET'S GO!
Past Russell: Ohhhh boy...
Past Drift: Extremely confused
Past Jetstorm: Uhm...
Past Slipstream: Just as confused as everyone else