Can applying for different but consecutive jobs at the same insitution be perceived as wrong?
Disclosure: I applied for two positions at the same time in the same department and it worked out fine for me.

Clearly, I think doing this is fine. And I wouldn't be particularly worried about being perceived as trying to work in a particular country/institution if you're appropriate for both positions. Make sure to write your cover letters appropriately - both of them should speak to your interest and qualifications for that particular job.

You might, however, consider informing the people involved that you have applied for both positions. This lets them discuss you in the context of which position might be best for you, etc. For example, if Option 3 is super-interested in you, then Option 4 can take that into consideration. Or if strategically one is having a harder time filling their position, etc.