Censys expands queries to provide additional functionality. For example, the query a:zmap.io
executes a DNS lookup and expands to ip:220.127.116.11.
Your query was changed from:
parsed.tbs_noct_fingerprint: d4d3620c2ec2965892c8a3a7b13b323e1e5c1e18cfc1c6723b83f0cd7cca6ef4 and precert: true
parsed.tbs_noct_fingerprint: d4d3620c2ec2965892c8a3a7b13b323e1e5c1e18cfc1c6723b83f0cd7cca6ef4 AND precert: true
If this isn't what you intended, you can run your raw query without expansion.