If you're senior at your current company, you're not entitled to become a senior at the other company as well. You'll get whatever level you are interviewing for.
The promotion/increment would have come in due course. It's not that you received a sudden bonus. The initial communication with HR should've accounted for it.
Forget that, why are you looking for a % hike above your current CTC? I'm unable to understand that part.
This way if you plan to switch within 1yr will you also look for another 30% min hike? That's bs.
Determine what you want, ask the HR for it. If they refuse or lowball, interview elsewhere. If they offer you what you wanted, take it, be happy.