So we have another optional update only a few days after the last optional update. This time if you decline to install the update, but did install the previous one, the new optional update will remove the previous update while not installing itself.
Clusterfuck – Noun
(vulgar) A chaotic mess that might be compared to group sex, in which participants are so intertwined and intermingled that they might penetrate each other rather than their intended target. Its more precise usage describes a particular kind of Catch-22, in which multiple complicated problems mutually interfere with each other's solution. The looser usage, referring to any chaotic situation, probably prevails.