Why such a dramatic drop in gold loot? Pictures inc

http://imgur.com/IPEbYw5

http://imgur.com/s91F28b

On my level 39 account a level 55 has 293k loot yet on my level 63 account it drops all the way down to 18k! That’s a huge difference yet the trophy difference is only 4. My other account wouldn’t stand a chance so the high loot count is a pointless tease, but because I could beat it on my main account I am not allowed his/her gold?

This is a curiosity question due to confusion, not a rant