Thank you for your attention
Some items only stack a maximum amount. I think the microbots may have stacked up to 10 originally in the past, but it was limited to a smaller value due to being a healing item. So as far as I am aware, this is intentional.
Regarding the "Vial of Gray Microbots," I mentioned it because Nova (Gray Goo Armor) requires 10 vials to perform one of the available upgrades. However, since the vials were split into two sets of five, the upgrade cannot be completed.
To obtain the "Omega Fever", it's not just the wetness that is looked at (since you've already met that requirement from the stats), but your character will also need to be in "Fuck Fever" with close to 5 days left or more, have anal wetness level of 5 or more (raw value), have an anal bonus capacity level of 200 cubic inches or more, a genital elasticity rating or 3 or more, and they should not currently be anally pregnant. If those conditions are met and Omega Oil is used, there should be a 50% chance to trigger the variation that gives the perk. Hope this helps.
Regarding "Omega Fever," what happened was this: I had already obtained all the necessary transformations to unlock it. However, I acquired the moisture state through the "Ass Slap Patch," and the last transformation (the one highlighted in the image) granted me two moisture points, for a total of 5. Even so, when I tried to unlock "Omega Fever," it didn't work.
Only when I used "Omega Oil," raising the moisture level to 7, was I able to obtain "Omega Fever."
I can't seem to replicate this bug. From what I'm aware of, the game shouldn't register the click between screen changes, but I could be wrong. Are you using touch controls (touch screen) or are you clicking more than once on a button? If there is a lag between the screens changing, that may be a factor, but I am not sure.
Yes, the device is a touchscreen. After your response, I returned to the game to test it again—it took several tries, but the problem continued to occur as described.
Additionally, I remembered two other bugs and have a question:

Penny's "Drone" text is getting mixed up: the normal text is mixed with the reload text.
According to the wiki, Steele's exhibitionism should increase when he interacts sexually with Tetra and Mica, but when I tested it, it didn't.
As for Tanis, just a question: when practicing archery with him, shouldn't Steele's aim improve with these practices?
Finally, I'm curious: was Liamme originally planned as a recruitable character for the crew, but that idea was scrapped? I'm asking this because of an interaction I had with him, in which he stated he wanted to join a crew.