Some folks have been interpreting my issues (part 1 and 2) incorrectly, so I'm adding a part 3 in order to ensure I'm communicating as clearly as possible.

Anytime the measure uses the statement "First Two Years", the first day is not counted due to how CQL handles precision. This means that if any of the following data elements are documented on the patient's birth date, it will not count:
"Anaphylactic Reaction to DTaP Vaccine"
"Encephalopathy due to Childhood Vaccination"
"Anti Hepatitis A IgG Antigen Test"
"Adverse reaction to vaccine product containing Hepatitis A virus antigen (disorder)"
"Hepatitis A"
"Hepatitis B Vaccine"
"Hepatitis B Vaccine Administered"
"Anti Hepatitis B Virus Surface Ab"
"Anaphylaxis due to Hepatitis B vaccine (disorder)"
"Anaphylactic Reaction to Common Baker's Yeast"
"Hepatitis B"
"Anaphylaxis due to Haemophilus influenzae type b vaccine (disorder)"
"Adverse reaction to vaccine product containing Influenza virus antigen (disorder)"
"Malignant Neoplasm of Lymphatic and Hematopoietic Tissue"
"Neomycin adverse reaction (disorder)"
"HIV"
"Disorders of the Immune System"
"Measles Antibody Test (IgG Antibody Titer)"
"Measles Antibody Test (IgG Antibody presence)"
"Measles"
"Mumps Antibody Test (IgG Antibody Titer)"
"Mumps Antibody Test (IgG Antibody presence)"
"Mumps"
"Varicella Zoster Vaccine (VZV)"
"Varicella Zoster Vaccine (VZV) Administered"
"Hepatitis A Vaccine"
"Hepatitis A Vaccine Administered"
"Measles, Mumps and Rubella (MMR) Vaccine"
"Measles, Mumps and Rubella (MMR) Vaccine Administered"
"Adverse reaction to vaccine product containing Streptococcus pneumoniae antigen (disorder)"
"Adverse reaction to vaccine product containing Human poliovirus antigen (disorder)"
"Streptomycin adverse reaction (disorder)"
"Polymyxin B adverse reaction (disorder)"
"Neomycin adverse reaction (disorder)"
"Anaphylaxis due to rotavirus vaccine (disorder)"
"Severe Combined Immunodeficiency"
"Intussusception"
"Rubella Antibody Test (IgG Antibody Titer)"
"Rubella Antibody Test (IgG Antibody presence)"
"Rubella"
"Varicella Zoster Antibody Test (IgG Antibody Titer)"
"Varicella Zoster Antibody Test (IgG Antibody Presence)"
"Disorders of the Immune System"
"Varicella Zoster"

Anytime the measure uses the statement "Vaccine Administration Interval - 42 Days up to 2 Years Old", the first day is not counted due to how CQL handles precision. This means that if any of the following data elements are documented when the patient is 42 days old, it will not count:
"DTaP Vaccine"
"DTaP Vaccine Administered"
"Hib Vaccine (3 dose schedule)"
"Hib Vaccine (3 dose schedule) Administered"
"Hib Vaccine (4 dose schedule)"
"Hib Vaccine (4 dose schedule) Administered"
"Pneumococcal Conjugate Vaccine"
"Pneumococcal Conjugate Vaccine Administered"
"Inactivated Polio Vaccine (IPV)"
"Inactivated Polio Vaccine (IPV) Administered"
"rotavirus, live, monovalent vaccine"
"Rotavirus Vaccine (2 dose schedule) Administered"
"Rotavirus Vaccine (3 dose schedule)"
"Rotavirus Vaccine (3 dose schedule) Administered"

Anytime the measure uses the statement "Vaccine Administration Interval - 180 Days up to 2 Years Old", the first day is not counted to due to how CQL handles precision. This means that if any of the following data elements are documented when the patient is 180 days old, it will not count:
"Influenza Vaccine"
"Influenza Vaccine Administered"

This is all fixed in the 2023 CMS 117 with the addition of "day of" to the CQL.

As for details on why the first day is not counting for these intervals, follow CQM-4681 and delve into the ELM.