Lmo
ESA entitlement letters are pretty bad, as you say you should be on ESA(CB) with an ESA(IR) top-up.
If you are concerned that this is not the case, although it should not effect the amount you are being paid unless you have other income, then contact the DWP office dealing with your claim.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
