Is it acceptable if an advisor does not include me as a co-author on presentation?
There are basically two schools of thought on who should be on the title slide of a presentation: (i) everyone who has contributed, (ii) the name of the person who is actually standing in front of the audience and giving the presentation.

There is no accepted standard for which is the "correct approach". I tend to think that fields where projects only comprise 2 or 3 people use method (i), whereas more collaborative fields use method (ii) -- and I tend to think that that makes sense, because otherwise one would have to list a dozen or more people on the title slide, which is simply not very practical, and also not useful to the audience.

So I don't think that taking your name off the title slide is unprofessional or unethical in itself, even if you were the one who prepared the slides -- your adviser was, after all, the one who presented the talk and the project.

That said, if the adviser had been me, I would have made sure that you would have been prominently mentioned in the talk (and made sure that your name is spelled correctly!) but in the beginning ("Before I go through the details, I do want to mention that most of the work I am presenting here today was actually done by my student rapidCascade, and I do want to make sure that he gets the credit he deserves!") and at the end ("Before I end, let me acknowledge that many people have contributed to the work I just presented. In particular, I'd like to single out rapidCascade who has done more than any of the others.") These words may not be reflected in any of the slides, and unless you were there in person, you'd never know that this much credit was given, but it is possible to highlight someone's contributions without making this explicit in the slides.