Map requisites

[(((]

I am trying to create my own map, but every time I try to vote it on a server I get the failed requisites message. I've done my reading, and I adjusted the mean height to be below 30 using the /showmapstats. However, no matter how many walls I add, or how much space I remove, the area number doesn't seem to change. Can somebody please help me reduce this number on my map? I've seen maps much much larger than mine that are acceptable.

Thanks in advance.
Here's the map:
Siege
https://mega.nz/#!op4XDS6B!Ursm6bA1aCczT...lJ178Bga-0

Smaller version, still too big
https://mega.nz/#!JkwnFRwC!rbsnxdx9jMGwW...iVBViAcIN4