It's not unusual at all. Some eggs don't stay round, they actually have slight dip in them. Most will stay ovoid in shape but don't worry if a couple don't.

Add a bit of water to your bedding and reseal your container or just spray them off with water that is about the same temp.

When I ran really big incubators I used to keep a couple of spray bottles right in the incubator so that any batch that looked a little on the dry side could be misted.

Don't worry though, it's all normal stuff from what you've written.