Question

Is "recorded accordingly" incorrect grammar?

Answer 1

This verb phrase "recorded accordingly" incorporates correct grammar.

Recorded is the verb.
Accordingly is the adverb.

Explanation:

Although the criterion was focused, and the experiments were long and tedious, the results were recorded accordingly.

This is an example of the use of the verb phrase in a sentence.
It means the results were recorded in a manner that matched the exacting requirements.