1100-1200 is the norm for a super rare.

Count up your rares, its 60 seals for each, so if you have 20 that's 1200 pulls and you should get it soon. If you have a lot more than 20 then yeah something could be wrong, maybe put a ticket in? Its not exact because you get frags too, so you might have Kushimaru and 40 frags, but you've only pulled him twice and been lucky with frags pulls, but it's a good estimate.