I am having problems with completing the Deal with russians mission. I first got to know about the Rocky island by CDF contacting me, so I went there. Then we successfully captured Lopotev and he got transported to our base, and I then took him by the truck to the meeting point where we got attacked. I didn't see the enemies as it was at night and it was hard to fight them back, so I decided to quickly get in the parked russian truck and escape ASAP.
Then, after some time, the USMC has arrived in Chernogorsk which we've captured and I got to command the US troops. They told me to check the Rocky island for some enemy HQ, so me and my squad flew there (again). It was such a dead place now, but even after walking up directly into the mission pointer, going around the house or climbing up the radio tower, the mission still hasn't been marked as completed. And another problem- the Deal with russians task still isn't marked as completed, while after getting back to the place (it's about a hour since the last transport), I cannot see anyone now and the place is all empty. We even flew around the area a bit but couldn't find anyone. After reading some walkthrough I've found that I need to kill those spies and wait for the Russians to tell me the transport was successful.
Is there then any possibility of completing those missions? How should I proceed from now? Or should I start the mission from the very beginning again? And in what order should I then take the tasks? I wanted to have the game 100% completed, as I tried to get all the evidence before, I wouldn't like to end it just a kinda half-way by only destroying the Chedaki base (if that ends the mission)