That's about right.
It's just a massive break in the momentum.
Sue knows 15 year old Reed for a week, they all get powers, hunts him for a whole Year across the globe, convince Reed that they're not evil, teams up, beats up her old boyfriend Doom, and then they buy a city together no money down.
I thought it was even stranger than that.
I don't remember them saying how long it went from Reed getting recruited, saying goodbye to Ben (who helped him develop the prototype of the transporter), and then Victor re-joining the project and them getting it working. It seemed like it was a while though. There's also very brief intimations that Victor had a thing for Sue that was unrequited but it's pretty much abandoned as soon as it's introduced.
I felt the worst for Ben in this scenario - he doesn't join the team on the project--Johnny is recruited as punishment, really, for smashing up his car. Once it's tested as working Victor, Reed, and Johnny get it into their heads that they made it work and others are going to get the 'first man on the moon' fame since the military plans to send a team as the first human subjects. They decide to go themselves.
Reed wants Ben involved since he helped him getting the prototype working in the first place and so Ben goes with them only to get transformed in the later accident. So after not working on it for a while (the movie makes it seem like Reed has been giving him regular updates) Ben is called one night, suits up for the journey, and gets his powers all over the course of a few hours.
Then Reed disappears for a year. No wonder Ben was mad at him.
Sue only gets her powers through splash damage and she didn't even go to the other planet/dimension until the end battle.
Reed rejoins the 'team' and they're all together with their powers just in time for the end 'battle' against Doom. It takes maybe 5 minutes.