Text blocks jumping moving during page transitions.

Hi all,

I wondered if anyone can help me here...

I am currently working on an e-learning project and I have replicated a fault that it appears to have when I publish it.

It all works fine but if you view it and click the NEXT button, the block of text fades out and is then replaced by a new block of text (which is what it is supposed to do). BUT... if you look closely, some of these text segments look like they are moving up a little bit in particular, the top line. 

I have set the X and Y position co-ordinates the same on these bits of text but the problem remains.

I have also updated my version of storyline to the latest one but to no avail.

Has anyone got any ideas?

Thanks in advance.