I hate to break it to you but most alliances sandbag to some degree or another. Whether it's hamfistedly putting 10 level 8 iron dummy accounts with 20 250+ atomics/CW's, or taking newer players into the alliance to show them the ropes (and lower overall war weight). Even the alliances that don't sandbag in this way split the groups into attackers and defenders. Meaning they'll have several max atomic offenses with practically no defense and then have their heaviest defensive bases up top.
Basically manipulating Nexon's poor algorithm to ensure favorable or even decent matchups is one of the most strategic parts of the game at this point. Especially given the all troop cards and decoys all the time mess that wars have devolved to. I'm sure many ''sandbaggers'' and fair play groups alike wish this wasn't the case. However we're over 18 months into this glory system and despite countless posts and lip service about it nothing has changed. Most likely nothing ever will. The big money on top likes the status quo. You probably need to adapt and figure out which version of matchup manipulation your group will go with, or else you're just going to get more and more frustrated.
As Metallica sang, "So it comes to be that the soothing light at the end of your tunnel, is just a freight train coming your way."
You can either climb aboard it or get run over by it, because the engineers have been asleep for a very long time now.