Well, this is an impressive mass of work (your note makes it sound like a project, not a mainly completed reality). In any case, here are the problem cases (astonishingly few), many of them the result of relatively recent changes which have not been accepted in all dialects, but are close to the community consensus. There are a couple of cases still up in the air as well.
2: 'mi moku li pakala li pakala' is OK
3 'mi moku e moku mute mute mi' ? marginal, nice to have a hard datum
4 ('mi kepeken e poki mi', 'mi kepeken e ilo') listed as OK but not: no 'e' with 'kepeken'
6 'sina wile toki e tan tawa mi' grammatical but possibly inappropriate (“talk about”?) not sure how to sort these out
All the rejects here are at most punctuation matters, questionable question marks and definitely wrong period.
7 'Linnula' is not proper spelling final /n/ can't be before initial /n/ or /m/.
'mi wile wile e ni: mi lon' is OK, the others just lack the 'e' (and even that may be permissible in some contexts)
8 'ma Elopa/ma tomo Pelin lon seme' lack 'li' – not grammatical
'ni li lili li suli tawa sina?' is just questionable question mark.
'Alipe Eintein' is not an unofficial word – no VVs allowed.
9 Contentious issue: can unofficial words stand alone as predicate, e.g. 'nimi mi li Kipo' Reason and the general rules say “No”, pu says “Yes” and you follow pu, thus furthering the spread of nonsense (and bad rule use).
10 about the limits of grammar: 'lipu ni li pilin lete' is wrong because 'pilin' (like 'olin', etc.) only takes sentient subjects, which 'lipu' probably is not. But is this grammatical or something else? (I suppose it intends 'lete pilin')
settled but still disputed: 'mi kin' requires 'li' so 'mi kin olin e sina' is ungrammatical.
I didn't see a case, but can a sentence contain 'anu' and not be a question?
11 Yeah, titles are a problem. This seems to be going in the right way (I prefer all have quotes, like untpized foreign words).
12 'akesi mu li tawa' is borderline. Those who use 'mu' and 'a' as verbs and nouns (and, hence, modifiers) say it is fine; otherwise not.
14 As earlier 'jan mute mute mute li kama' is questionable on various grounds. Any sensible reading requires at least one 'pi', but ….
'ni li jan lili ona pi nanpa tu' is ungrammatical – no 'pi' with 'nanpa'
'ni li jan tu tu tu tu' is clearly OK, since officially there are only 'wan' and 'tu' as numbers; the use of 'luka', etc. is officially optional (or even discouraged).
15 And, if you must use a comma with 'la', it goes after the 'la'.
The multiple 'mute' problem again. No clear solution in sight, but the old rules would allow at most two 'mute' in a row without a 'pi' (one “very” and one “many”).
'ken la tenpo pimeja la ni li pona' is clearly grammatical,
I don't now understand your use of unofficial unofficial words, like 'X-Files' and 'MIRC' but not “Lisbon”.
I'm also wondering about rejecting a sentence because of a (moderately appropriate) comma.