- Questions that can have multiple answers that approach a problem from an entirely different angle are probably problematic themselves
- In the case of two answers that are applicable depending on the conditions, even if they are mutually exclusive, one answer is probably more effective for future readers, but splitting them up is okay if that is your preference
- In this specific case, you had one good answer, and one ... not good ... answer, so you probably should have stuck to the good one
Multiple answers likely indicate a problematic question
Why is it possible to provide multiple answers to the question? If there is a clarification question that can be asked to limit the amount of answers, that should be done before writing an answer. For instance:
Q: "Do I have to write a resignation letter if my contract is ending?"
A: *"If you have no choice in the matter, you do not need to write one because the company is essentially forcing you to resign, but if you are voluntarily not renewing an offered contract, even if the old one is expiring, you should
Rather than giving two opposite answers, it may be more useful to ask in a comment, "Were you offered a contract renewal and you are going to decline it, or is your contract not being renewed at the choice of your employer?". If you find yourself thinking that there are more than one totally valid and good answers to the question, then you should probably take a second look at the question before answering instead.
Answers are better when grouped
As explained on Good Subjective, Bad Subjective, good subjective questions invite answers that explain why and how -- one good way to do that is to focus on explaining the thought process behind the answer(s) rather than just giving the conclusion. Take this question for example: Is it ever acceptable to round up my GPA on my resume?
Now I could provide two answers to this. One explaining that it is okay to round up, and explain why, and then make a separate answer for no, and explain why. But that only explains why I think each way, and doesn't provide any explanation of how the asker should make that decision for themselves. Instead I combined both perspectives in to my answer, and I think it is a better answer for it (disclaimer: I may be biased).
Maybe there are some corner cases where it is better to have separate answers. I cannot think of one in the time I've spent on Stack Exchange, but it's possible. If you do, feel free to provide two separate high-quality examples that meet the Good Subjective, Bad Subjective criteria.
That wasn't the case this time
You should have stuck with your undeleted answer in this case. I think you know why; if you truly want to discuss the details, I am more than happy to, but it really wasn't a great case to discuss multiple answers (link is 10k only).
To put it bluntly, even if that was your only answer on the question, I am relatively certain it stood a good chance of being deleted by the community without any mod intervention.