First of all, highly appreciated that Mylord7, you started this post. :D
Okay, so now, after going through all of this thread. I can say, I belong to DeeDe99's scenario.
I have 2 TT, one with Lvl 10 dragon & other with 2 dragons (both Lvl 7). I have observed my epic dragon more than others. My epic dragon shows "Collect Gold" after 3 golds. Now I know its actually shows up on 4th one. I collect it after 24 hours +1 everyday so I can get 5 bars.
On the other TT, two dragons (both Lvl 7), I've just recently evolved one of them to lvl 7 so I haven't noticed their behavior. I will report back in 1 day :)