AcuFieldView multiple datasets?

Hi - I'm trying to open multiple transient datasets of the same simulation in AcuFieldView. I have two .Log files that span timesteps 1-10 and 11-20 and I want to make an animation that includes both sets of data. However, when I try to sweep through them, timsteps 12-20 just look exactly the same as 11. I end up with an animation for the first half and then a static image for the second half. If I make the two animations independently I get the right results, but I'm left with two video files instead of one.

 

Is there something I'm doing wrong? When importing the data I used the AcuSolve direct reader, and chose append. In the transient data controls I then checked off 'Use Merged Times.'