I've been on Colemak fulltime for a couple months, and I'm averaging around 50wpm.  I think I could be much faster by now, except that I still make a lot of mistakes.  What I find very interesting is the nature of the mistakes that I tend to make.

Touch typing is a subconscious act.  You don't think about what key to hit, you just hit it, right? 
Based on that, I would expect that when learning Colemak from QWERTY I would occasionally hit the QWERTY key directly instead of the Colemak key.  But that's not what is happening.  What I've observed in myself is that most of my mistakes, I am using the correct finger for Colemak, but I'm hitting the row for QWERTY.  Even if it's the wrong hand, it happens the same way.

For example: instead of 'r' I will sometimes hit 'w'.  Instead of 'o', I will sometimes hit ';'. Even if the hands are opposite: trying to hit 'e' I will hit 'u'.
In examining my mistakes I have found this to be rather consistent.  Colemak finger hitting the QWERTY row.

Anyone else experience anything like this?  Any tips on how to get past it?
I feel like I'll be back at or very near my full QWERTY speed once I can get past this stage.