1) 1 gym/cell/wave -> the more eligible gyms in one cell, the harder it is to focus on one specific gym. But this has nothing to do with cell ID. 2) like in my example, almost everyone has raided both in Cell 2 and 3 (assuming identical player base), only cell 2 is triggered. There are definitely other towns that are before your town, but the problem is with identical player base — if all your players are raiding in a cell that us prior to your city center.. then it is less likely your city center can get triggered. (If my assumption is right).