Chris there really is no right or wrong with the direction of honing, most people do the away and back it seems, probably because that's what Lynn's vid shows....
Kind been thinking on this one and you have some variable that is coming into play here....
You have honed razors that shave fine and you have shaved different razors fine....

So my sugestion is to take one of these razors that is giving you problem and start from scratch on honing it, leave the other alone....

As to overhoning I am sure you have read some of my other posts on that, it just isn't all that easy to do... I would bet on an under or mis honed edge first.....

Another thing you want to do is look at the blade from all angles, it is not so rare to find that they are not all that even from the factories....

In fact here is an interesting pic... I tried to catch how totally off center this blade was made...

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