Jax, Hopefully this can be improved soon but the "staff" of Construct 2 is just two guys, and I'm not sure if both of them work on the programming side. They just released a new version of Construct 2 beta today so it's probably been a busy day for them, and if you're in their timezone it's pretty early in the morning <img src="smileys/smiley17.gif" border="0" align="middle" />
Give them time, they want to make the best product they can, but they have to finish the game dev side first.
Edit: Also, Construct 2 currently exports its HTML5 apps/games as an iframe entirely I believe, so you might be best to put the animated parts into separate iframes and have the text as raw html parts.