Another job move

So I moved jobs to here 8 months ago.
Things are not all sweetness and light as I thought it would be.
Anyway, another job has appeared internally which I think I am more than capable of in a better (bigger) team, and having spoken to the training manager for them, he is more than willing to get me an interview in the next two weeks.
He said that if I can convince him I am worthy of the level they are asking (Technical Architect role) then they will get me in immediately.
If not, he would still get me in at a lower level for 6 months to see if I can cut it - if not then I think I could stay there and work on becoming a TA.
Is it bad form to move internally after 8 months though?
Things are not all sweetness and light as I thought it would be.
Anyway, another job has appeared internally which I think I am more than capable of in a better (bigger) team, and having spoken to the training manager for them, he is more than willing to get me an interview in the next two weeks.
He said that if I can convince him I am worthy of the level they are asking (Technical Architect role) then they will get me in immediately.
If not, he would still get me in at a lower level for 6 months to see if I can cut it - if not then I think I could stay there and work on becoming a TA.
Is it bad form to move internally after 8 months though?
Comments
Looks like my team can block the application because me leaving would leave a big enough hole to render the team inoperable
Looks like I am staying put then.
Guess they like me enough to keep me!
BTW i don't see the reason why the company should build the team around one person
Other than me, there's a university graduate and someone who got promoted from the service desk in more junior positions.
Sorry to hear it didn't work out. Well, being appreciated is right up there with "getting paid" and "job task" when it comes to a job.