Rocket tooltip numbers for resources don't add up

Upon return, the resources retrieved were:

Cargo bay 1:
  349.3 Kg Methane
  480.5 Kg Carbon Dioxide
  46.2 Kg Niobium
== 876 Kg total

Cargo bay 2:
  369.3 Kg Methane
  480.5 Kg Carbon Dioxide
  46.2 Kg Niobium
== 896 Kg total

 

Total mass retrieved is 1772 Kg, matching the amount the pre-launch tooltip claimed would be retrieved, although it's split differently between the cargo bays.

 

The value displayed for "resources available" is now 898.4 Kg (somewhat more than you would expect just by subtracting the amount retrieved -- I'm not sure, but I bet this is because of additional resource accumulation while the rocket was in flight).  The tooltip shows the cargo bays being filled to 498.2 and 221.9 Kg, for a total of 720.1 Kg -- again, the rocket wouldn't retrieve all the supposedly "available" resources.

In the Starmap, "Current mass" of the destination is shown as 127988.9 tons, while "minimum mass" is 127988 tons.  This implies about 900 Kg are available, which matches "resources available", not the amount of resources that can actually be retrieved.

 

So, it appears that the "Resources available" figure is inaccurate, but the tooltip showing per-cargo-bay resources is accurate -- if you ignore the breakdown and look only at the total resource mass.  The more prominent "resources available" number, and the "current mass" / "minimum mass" indicators in the starmap, seem not to accurately reflect whether the rocket will actually return with a full load of cargo.

There are liquid resources in Oily Asteroid. If you install a Liquid Cargo Tank the total amount of retrieved resource will match the resource available.