>Transfers from a starship to a foreign starship are not limited by the fuel or cargo capacity of the foreign starship. Excess fuel and cargo will be lost.
Yes transfers can be larger than the target ship can take, but the excess is not simply "lost", instead it it returned to the sender.
If the sending ship ends with more fuel/cargo than it's fuel tank or cargo hold can take, excess is destroyed on a prorata basis.
A Fed MDSF beam transfers 50D, 50T, 50M, 50S to a Lizard LDSF.
After beaming that cargo, the MDSF loads 150 clans from the planet below.
Unknown to the Fed the Lizard LDSF is already carrying 1100 clans.
During the host run 25D, 25T, 25M, 25S successfully arrive in the LDSF cargo bay (bringing it up to 1200kt), but 25D, 25T, 25M, 25S are returned to the MDSF.
The MDSF now has 150C, 25D, 25T, 25M, 25S on board (total 250kt). 50kt must be lost. 50/250 = 20%.
20% of clans are lost. 150*0.8 = 120C.
20% of Duranium is lost. 25*0.8 = 20D.
20% of Tritanium is lost. 25*0.8 = 20T.
20% of Molybdenum is lost. 25*0.8 = 20M.
20% of Supplies are lost. 25*0.8 = 20S.
The end result is the LDSF has: 1100C, 25D, 25T, 25M, 25S (=1200kt)
The MDSF has: 120C, 20D, 20T, 20M, 20S (=200kt).