You are 100% correct.
Back when I worked for State Parks we had a parcel that was acquired by the local County. The County screwed up the acquisition and managed to record a Deed which covered the whole mother parcel and missed a 1917 parcel deeded out (the south 35'). It messed up the sale of the 35' lot right before the crash.
The owner of the mother parcel deeded out the south 35' in 1917 then the remainder stayed in the family for the next almost 100 years. The in family transfers (death transfer, etc) never mentioned the 35' out parcel, just the original description with no exception.
Anyway the owner of the 35' parcel happened to see me out in the field one day and told me about what happened.
It took me about 2 hours in the recorder's office to find the 35' deed out then the chain up to the present day.
A Title Company did a major screw up there.
So yes, Land Surveyors should be be versed in at least basic title research.
I haven't had access to Title Plant indexes which I understand are a lot better than the Grantor/Grantee indexes at the Recorder's office.
This post was about researching records, not errors in legal descriptions. What is the difference between a deed I copy and a deed the title company copies?? Absolutely nothing.