Anna Gordon is on extract 1 & 2. If it was the same Anna, the C or Con/Com must be for Communion not Confirmation. I assume extract 1 was 1824 and 2 was 1828? If so, then I would take it to mean that Anna took Communion on the first date but not the second. The dashes in 2nd piece may have meant that she and William either didn't attend church at Easter or attended but didn't receive Communion. Catholics are required to take Communion at least once during the Easter season. The Easter Season lasts until Pentecost/Whitsun.
Customs re Confirmation have changed a few times during last 200 years. Ages and order of Confirmation and First Communion have been different. Individual bishops seemed to adopt a practice when it suited their local circumstances. E.g. I attended churches in England and Scotland late 20thC. English diocese had returned to Confirmation before First Communion; children were being confirmed young - around age 8. Parish priests were administering Confirmation instead of a bishop. The diocese in Scotland had retained the system in practice for much of 20thC. First Communion age 7-8, Confirmation by bishop at end of last year of primary school, age c12. Custom in that English diocese 50 years ago was First Communion around age 7, Confirmation between approximate ages 9-15 depending on when and how often bishop visited. A large city parish would have annual Confirmation ceremonies; a smaller parish might have them at 5 year intervals. A century ago, the norm was Confirmation around age 10 followed by First Communion.
I don't know what typical ages for sacraments were 200 years ago or what procedure was. 1820s & 1830s is well before restoration of Catholic hierarchy. Britain was still officially a mission country as far as Vatican was concerned. Some of my English Catholic ancestors lived in an area which was approximately 30% R.C. in late 18thC. A visit from a bishop was a rare thing. Hundreds of people were confirmed at one go in country house and barn chapels. Many may have been adults.
I haven't seen a Status Animarum for any parishes of my people.
https://en.wikipedia.org.wiki/Parish_family_book with a link to Rituale Romanum.
According to wiki (my secular bible
) they were originally intended for sacramental and other religious information. By 18thC other data was being added such as ages.
The notation for the nameless Stuart may be a Latin abbreviation - that's only a suggestion. A for absolution?
I also wondered if it was A.D as in Anno Domini followed by a number.
Reading rest of the document might help to see if there was a pattern.
I couldn't make much of 3rd extract except names.