Impact H-AR weird behaviour with mod combinations

Note, this is different from this bug report (https://help.marathonthegame.com/hc/en-us/community/posts/52727719301908-Weapon-mods-display-incorrect-stats-when-multiple-mods-bring-the-weapon-s-stat-over-the-maximum-possible), as the behaviour exhibited here happens before the weapon reaches its max potential stat and is only seen on the Impact H-AR.

The first example of this bug is with respect to the Recoil stat on the Impact H-AR. The maximum possible reduction of the Recoil stat on this weapon is -70%, down to 10% from 80%. Superior Vigilant Grip and Superior Steady Rounds each provide a -30% improvement to the Recoil stat individually. However, when equipped together, they each show an improvement of -40%, while showing a total bonus recoil as -70%. The correct behaviour should be that they each provided -30% with a total of -60% bonus (Recoil stat at 20%).

Here are the pictures of them individually:

Here are the pictures of them both equipped:

As you can see, while they are both equipped, the two mods somehow have an improvement greater than the sum of their individual stats.

A second bug on the Impact H-AR is with the ADS Speed stat. The maximum possible ADS Speed improvement on the Impact H-AR is -0.6S (from 0.8S to 0.2S). An example of this can be seen if we equip the Far Reach Optic (-0.3S standalone) with the Speed Scout Grip (-0.5S standalone):

Now, there is a different combination of mods that should be able to reach this max reduction in ADS Speed but it can not: Ornithologist + Far Reach Optic.
Ornithologist on its own provides a -0.3S improvement, same as the Far Reach Optic. However, when you equip both of the mods together, the total reduction in the ADS Speed stat they have is -0.45S, instead of providing an improvement of -0.6S.

Here are the pictures of Ornithologist and Far Reach Optic equipped individually (with no other mod):

Here is the picture of Ornithologist and Far Reach Optic both equipped on the Impact H-AR together:

As you can see, the total reduction to ADS Speed is -0.45S, while it should have instead been -0.6S (-0.3S + -0.3S).