No that scan does not indicate anything other than Issho attacking Law. I simply do not know where in that scan you gathered that from.
Just because he broke out of the ice does not suggest he can contend with Kuzan. Kuzan casually froze him and was not a single bit concerned that Don broke out. His subordinate was thankful ^& even suggested that the reason he broke out was because it did not reach his heart. If anything most people would agree that was a warning given by Kuzan to f*** off or else. The only other strong character to get frozen by Kuzan was Jozu albeit he was distracted by his captain.
Admiral level is taken too lightly.
It doesn't indicate they are trying to fight him together yet either, or Don and issho would have capitalized on him. I believe the two were still testing each other out for a bit.
You also don't see any fear in doffy when he proceeds to still try and kill smoker. He stopped when he saw how serious he was, but he wasn't afraid to square up with him or even fleet admiral Sengoku. It'd just take too much time to fight, and I'm sticking to that. Yes admiral level is very high, but I think it's more that you're slightly underestimating Don