There may be procedural grounds to contest too, such as whether the item was on the agenda circulated to residents ahead of the meeting etc.
Frankly for only 8 units it’s a bit strange that everyone isn’t on the EC, nor that the EC wouldn’t informally raise these issues well ahead and around a meeting. Not a great way to run the complex.
The affected residents should have some conversations with the EC, with some suggestion of nominating themselves instead of current members next time the EC is up for renewal given the way this issue is being managed…