People think that there was a 2nd cave in the ravine.. I dont .
I've not seen anyone say that. They found what they call a den. A space in the side of a snow drift or slope of the ravine which may have been made or dug out by using their feet. It looks like there was no roof. A possibility is they were breaking the large branches on the ceder to make a roof for the den.
The spread of clothes found at the fire may have something to do with people getting wet and trying to dry clothes.
It was suggested there was a lot of activity around the ceder and on the way to the den. Broken/cut trees etc.
The snow shelter/cave is suspected to be where the ravine 4 were found, under collapsed snow which can be extremely heavy. Depending on the condition of the snow and humidity in the air etc( I am no expert) it can be like concrete after a collapse. You can not move.
Zolotarev was found lying on the side of the broken ribs. He would not be lying on this side if he was alive with these injuries. Also the If you look at the bodies of the ravine 4 , it is conceivable they were lying together closely for warmth. Less damage to their hands because they used a naturally formed shelter.
Nikolay Thibeaux-Brignolle was also found there with the impact on his skull which could be the result of a large mass of wet snow falling on his head which in turn was resting on rocks. Likewise , Lyudmila lying on her back and then the collapse breaking her ribs.
Its not a perfect explanation but nothing is. If this collapse happened on the first of February , it is along time before they are found. When these bodies were discovered it was said that they were decomposing quickly. There's nothing suspicious to me at all about missing eyes and the state of the flesh etc.