HOA Community Insurance vs Individual Owners' Coverage

[Terrill C.]

So our HOA general liability policy covers the exterior and interior of our townhomes, excluding personal property. This policy is written to insure our homes at 100% value. Outside of this, each homeowner carries insurance on their individual unit for 100% of its value as well. Few questions:

1. Is this an overlap in coverage? 
2. If it is an overlap, should the owner's only take out personal property policies?
3. Should the cost of the dirt/land, be included in the replacement value? This is a 58 unit development, so let's say even at $20,000K per lot, that's adding $1.16M in additional insurance coverage value, which I'm sure is contributing to our annual premium cost.

Thanks.