Struggling to apply double sided transitions to precomps
I don't know if i'm doing something wrong.
I'm really struggling to consistently apply double sided transitions to precomps. Mainly transitions such as dip to black, cross dissolve, film dissolve, sometimes wipes, refuse to be put over two precomps. They seem to work fine straight on the clips.
See my timeline: in the first instance, the dip to black won't cover the two clips, just applies itself to the beginning of the next clip. Second instance, this is a film dissolve, and has worked fine across the precomps.

Another example. First dissolve is fine, the second just will not be a double sided transition.

Here's a different example below. The first film dissolve is fine.

The second dissolve is off balance, it has a longer span on the right hand side then the left hand side - close up below.

What on earth is going wrong? All footage has been coded to exactly same standard and format in Prelude, so there's not mismatches of formats or codecs. Likewise, the whole lot is the same resolution.
Really appreciate any help on this.

