Not hugely into HR zones but I do know that the 220-age formula will only give an estimation of your max HR so I suspect your MHR is higher than you think. Also you should be working off a percentage of you Working HR not the max.
To calculate WHR, first measure your Resting HR, best done first thing in the morning, before you get out of bed and subtract this from your MHR. Calculate your percentages of WHR then add back the RHR to get your training zones.
So for example, MHR 183, RHR 43 gives WHR 140.
So 60% is (140x0.6)+43=>84+43=127
80% is (140x.8)+43=>112+43=155
This may not help you at all, and I'm sure others will be able to go into greater detail.
Sleep well and fear not, you're no more of a freak than the rest of us.