Another example is that with a tax auction it is common for all the interested parties to not be notified 100% correctly meaning they could in theory come back later and try to reverse the sale and take the property back!

@Chris Seveney is correct, security deposit claims only arise if the funds are not returned.

I’ve never had this specific issue but mistakes like this are pretty common. 

in my country real estate is not something that is so common,so was asking about the about the degree with the view that it would perhaps get me in track for real estate business.

On the other hand, you might find a common reason that a few of your potential investors are not investing that might change your own thoughts on the deal.

Now consider this: all the groups people are spending fortunes to target—foreclosures, absentee owners, probate leads, tax liens—what do they have in common?

I will give you the common-sense answer below, but this is California, where common sense doesn't exist.A mandatory evacuation is outside of your control, so you shouldn't suffer financially because of it.

Beyond legal requirements, I’d love to hear about any practical advice for managing properties, finding good tenants, and avoiding common pitfalls.

There are a couple of others less commonly used. 

while I totally understand the frustration especially purchasing what was supposed to be a new and ready to go asset, but these things are pretty common so don't feel to discouraged.