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Louis:First question is did you personally sign the drawings? If not then you have nothing to worry about you are not directly involved in the insurance. If you did sign them, first bit of advice going forward is if you do not have an ownership position NEVER sign drawings. Liability goes with the signature. If you leave a company you still have liability but may not have the umbrella of their insurance.Either way when an issue that could lead to an insurance claim comes up, even just could, always alert the insurance company. Most big ones have realized than when issues get contentious it is in their (the insurance folks) and their client's best interest for the client to have the advice of an attorney so they get you a specialist attorney in the right state to help you navigate the traps. Most policies DO NOT CHARGE for this help unless a claim is settled in the case in which case you pay the deductible. It is the best service ever. Additionally most insurance policies can be considered voided if there is an issue that the insurance company is not made aware of as early as possible.
I deal with all contract/claims/insurance issues at my firm. I have incredible brokers and I would be happy to tap their general knowledge for you if you have specific questions just send me a PM.
Finally, for what it is worth, no set is perfect and at some point most architects will face a problem involving insurance whether or not it is their fault. It is scary but not crippling; after all this is what insurance is for. The first time I did it was a MEP problem but the owner had to sue us to get to them. I lost so many nights sleep...I wish someone had told me then that in the end, it will be ok. So I tell you, you will be ok.