The ore science recipe ignores the setting to modify yield. I have the config set to 1, the recipe outputs 5. All other packs appear to work correctly.

MSP1 result count is overriden by difficulty setting when omniLib is present.

MSP1 is a unique case.
There are eight difficulty settings (easiest to hardest). Normal difficulty is "4". MSP1 ignores the result count setting and will give 9-(difficulty) packs per craft when omniLib is present for it's "0-level" efficiency... the one available at beginning of game...and possibly be modified further, depending on what version of MSP is installed.
-groans-
It's...what you see isn't a "bug"..it's more like..i didn't document the settings well enough to explain how things interact.

i'll add this to the list of stuff to update / clarify. It may actually be simpler just to make it work the same as all the other techs (MSP1 be unlocked by red science). something i've considered for awhile. would knock out a few birds with one stone

so i think (and forgive me if i'm wrong. i haven't had much time for factorio lately), that the most recent public release still has it set up so the actual minimum the pack will output if enabled is 2 packs per craft (hardest difficulty). Then based on what the "Result count is" and what the difficulty setting is set at, and what version of the efficiency-formula was in place it probably increases by "2" or "3" for each level i believe.