Walker Strength

Why is it that my Walker strength is only at level 114 when I'm absolutely maxed on all upgrades both in my walker pit and on the number of captured/level of walkers? I see other outposts who's walker strength is in the 140+ range?
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Answers
There is a thread in the Outposts discussion ongoing about this: http://forums.nextgames.com/walkingdead/discussion/10920/new-walker-strength#latest
@zbot @Teeceezy @eetu
Possible merge please