I have the following situation and seeking for urgent help.
I bought the following ticket on Expedia:

20.12.14 BKK-SHA with MU
20.12.14 SHA-SVO with MU (operated by SU)

Then I bought the following ticket on the SU website:

21.12.14 SVO-ZRH with SU

I planned to get a visa for 1 night and stay at the Radission Blue at SVO Airport. As I need another Visa from 31.12. to 03.01. the Embassy refuse to issue a double entry Tourist visa. So I only get the visa on my trip back from ZRH via SVO/SHA to BKK. My only choice is now to stay in transit for 1 night.
I just really worry about the following:

Can I check through my luggage in BKK to ZRH? One ticket is issued on MU stock number and the other ticket is issued on SU stock number. Both bookings are under a different booking file.

The second person booked on the same bookingfile as me have a Thai passport and can enter Russia. This will help to retrieve the luggage in SVO.

How about the check-in the next day for ZRH? Can I do online check-in during I am in transit and my travel partner drop of the luggage (2 pieces?).

Any advise in this situation is much appreciated.