Week 4 in the books:
Mon: Off
Tues: 5.04 Mile Run. 143 HR. 11:56 pace.
Wednesday. 4.23 Mile Run. 140 HR. 11:50 pace.
Thursday: 5.29 Mile Run. 140 HR. 12:06 pace.
Friday: Off
Saturday: 5.5 Mile Pace Run. 170 HR. 9:44 Pace.
Sunday: Long run 8.63 Miles. 149 HR. 12:07 Pace. Had a really hard time controlling heart rate here. Was all over the place. Could be the weather. 12 degrees and windy.
Total for the week 28.69.  Didn't do really anything but slower runs this week. Still fighting the lingering effects of a sinus infection. Very frustrating week to be honest. Feel like I'm actually going backwards in terms of heart rate.
		
		
	 
Chief you have mentioned quite a bit that you are getting frustrated with pace vs HR and in my opinion there appears to be a disconnect between being a 1:49 half marathoner and your HR at your current training paces.  It looks like you are running most of your miles around 12:00, and the McMillan running calculator has a 1:49 half marathoner running a 10:31 as the slowest pace for a recovery jog. 
This is the frustration. I expected to take a step back when I started HR training, but I didn't expect to be running 12:00 miles on the slow run days. 
How would you rate your current fitness compared to when you ran the 1:49?  If you lost a ton of fitness that might explain the disconnect.  
I would say I lost a little fitness over the winter, but I wouldn't have expected this much of a drop. I thought I was in decent shape, and 4 weeks into my spring half training I expect to me making progress, not seemingly regressing. 
What kind of HR monitor do you have?  Is it a chest strap, are you wetting the strap before you run?  I don't have a chest strap HR monitor anymore, but I remember having a tough time with its accuracy during the winter. Perhaps and inaccurate/broken HR monitor can explain the disconnect. You might find this link to be helpful.    
I just bought the TomTom watch with the HR monitor on the wrist, so I feel good that the data is accurate.
http://www.dcrainmaker.com/2010/04/troubleshooting-your-heart-rate.html
You have been given a lot of good advice about training and that advice should work well for most people since most adults have a max HR of 200 or lower.  Perhaps your max is higher than 200 and it would be good if you ran a 5k to find out you your max HR.  It is unlikely your max HR is that high, but it is possible.   
I do need to probably run a 5k to find out my max heart rate. Unofficially I tried to hit a max heart rate last year by going balls out (lying on the floor about ready to puke when I got home), and I hit 190. 
This is coming from a HR data geek, if I were you (assuming you are at 1:49 Half Marathon fitness) I would be running the majority of my miles between 9:30-10:00. If you can run easily at that pace and have the ability to hold a conversation you are doing it right. 
Almost all of training for the 5 halves I have run have pretty much been in this pace area. Except when I did speed work.  Today, I am probably not at 1:49 HM fitness. Especially since the last 4 weeks have been extremely slow miles.