do u know what?

to keep safe the main domain's account some people use different way..
like: they open blog in some places like wordpress.com or blogppl /bloglies etc etc place
using that url they applied for adsense while they get it
they use that for both places(google allow it)..adsense bot auto discover the second site

or u can appeal to google by explaining ur situation/say sorry or req or adjust ur money

but its wise not use link checker utility...

finally if yr appeal also denied.wait months..maybe 6months and apply again..sometime it helped out