There were code changes made last release to restrict Helos from carrying more than one vehicle and some of that also affects landing craft so things like the LST or LCM will only carry one tank primarily because the Leos "weigh" 32 "units" in the game and 32 only goes into 50, 54 or 55 once ( Tanks are not "weighed" in tons as some people think, it's an arbitrary number limited to 55 max that has NOTHING to do with actual vehicle weight )
The LST is limited to 54 "units" of weight and the LCM is limited to 50. The Leos "weight" of 32 means you couldn't put more than one in at a time regardless but the changes we made to the code also give you a <
> message if you try to load any other vehicles than MAY be under the total LC limit
You won't get a one vehicle restriction on the hovercrafts so they will hold a Leo and a couple of M113's and that's something we will look at in the fall. It's ALWAYS a good idea to spread your heavy assets around in LC but you should be able to load more than one vehicle in a LC IF it has the capacity and IF you really want to and you should be able to load more than 2 jeeps into an LCM 
Here's an explanation of how this works for those who may be reading this who A/ don't know or B/ have been assuming things incorrectly
The physical number limit in the code for "Carry" in MOBHack is 255 but 1 indicates a vehicle can tow a gun etc and 2 indicates it can carry another vehicle so although we could build a LC that carries 99 men ( having 99 as the Carry number ) . If we allow it to carry guns only we could give it a maximum of 199 carry which means it could carry men and guns only up to a count of 99 but when we give it the capacity to carry vehicles we bump into the 255 code number limit.
That is one reason why tank "weights" are not done in tons and why sometimes game issues do not and cannot reflect "reality"
Don