Question about using scale animator for text

Your cropped screenshot* leaves us guessing about your workflow. You are making things more difficult than they need to be. 

First, if you really want to use two text layers you have to understand that the scale animator scales from the baseline of the text. You will have to shift the baseline on the white text layer. Using two text layers is a pretty bad idea.

If I was trying to do what you are describing I would use a single text layer with a stroke, add a scale animator, if you want to also animate the stroke add Stroke Width to the Scale animator, then fiddle with the advanced settings to get the look you want. 

You could even add a second opacity animator to wipe the text off after you bring it on.

I'm showing you everything I did. The Offset was animated from -100 to 100 to grow the text from 0% in Y to 100% and change the stroke from 19 to the 10 pixels it is in the Character Panel. 

The second animator End is animated from 0% to 100% to wipe the text off.

I should also mention that you need to be careful with stroked text in video animations, especially if your fonts are small. Color compression in MPEG (H.264) delivery formats and the scaling that happens with media players can easily wreck your design. The text in your screenshot appears to be only about 10 pixels wide, the vertical part of the "t" looks to be about 3 pixels and the stroke looks to be about 1. That's never going to read in a video. It will be a mess.

* The "Drag & Drop here..." area is buggy and should not be used to share images. Please use the toolbar or just drag your images to the reply field.

That workflow doesn't really make sense, given that you just could add a Stroke layer style like in Photoshop and not need worry about anything liek stroke with or it following the letters' animation. Otherwise you can of course adjust the anchor point in the advnaced settings of the animator, but that doesn't solve your problem, as it's still a global setting and can't be tweaked individually for each letter, so by all means just slap on that stroke or explore alternative ways of creating it like using the good old Vegas effect or a massively overcranked Glow effect that creates harsh edges.

Mylenium