Text Dragging off in HTML5 Version?

Hey gang!

I have created some learning objects where you drag a word from a list and drop it on the proper blank next to an image. I've noticed some odd things in that, if there are a lot of draggable words, some times the click area is off. Example, if I have a column with the word "Yes", then directly under that text box is another text box with the word "Cat", sometimes in the html5 exported files in Firefox, when I try to click on Yes, there is no trigger. But when I click on Cat, Yes begins to drag. However it all works perfectly in the flash version. 

Is this a known issue like text boxes being too close together or too many draggable objects on stage? Just a little confused because this has only happened on a few projects, while others work perfectly well. 

Thanks for any thoughts. Greatly appreciated. 

Kelly