5 reactions that have to be checked in detail

With regard to pressure-dependent reactions, I have so far found 5 suspicious reactions, and 3 of 5 might cause significant issues.

 1. C2H3 + CH3CHO = CH3CO + C2H4 (NOx 2018, index: 373)
 2. CH2 + CH4 = CH3 + CH3 (NOx 2018, index: 62)
 3. H2CCCH = H + HCCCH (Nitrogen_Glaborg_Gimenez_et_al, index: 510)
 4. CH3 = H + CH2 (NOx 2018, index: 65)
 5. CH3 = H2 + CH (NOx 2018, index: 66)

1. C2H3 + CH3CHO = CH3CO + C2H4 (NOx 2018, index: 373)
So the source for this reaction is Chen, Song, Song, Lv, Li, Computational and Theoretical Chemistry 1075 (2016) 63–69 https://www.sciencedirect.com/science/article/abs/pii/S2210271X15004673

In NOx 2018, the A-factor is 0.16 [cm3/mol/s], but I think it should be 15.52 [cm3/mol/s] (in the paper, 2.579E-23 [cm3/molecules/s])

2. CH2 + CH4 = CH3 + CH3 (NOx 2018, index: 62)
I think the A factor should be 4.3E12 rather than 4.3E13, also Ea factor is 10030 cal/mol rather than 0.
See the source: https://ars.els-cdn.com/content/image/1-s2.0-S0360128517301600-mmc3.txt
My guess is that this reaction somehow was mistakenly considered as CH4 + singlet CH2 (i.e. CH2(S)).

CH4+CH2=CH3+CH3                      4.3E12   0.000   10030 ! 
! Bohland T Dobe S Wagner HGg BBPC 89:1110 (1985)
!
CH4+CH2(S)=CH3+CH3                   4.3E13   0.000       0 ! 
! Tsang W Hampson RF JPCRD 15:1087 1986  

3. H2CCCH = H + HCCCH (Nitrogen_Glaborg_Gimenez_et_al, index: 510)
I couldn't find the source and the reverse reaction shows TOTALLY non-reasonable behavior as below

4. CH3 = H + CH2 (NOx 2018, index: 65) & 5. CH3 = H2 + CH (NOx 2018, index: 66)
These two reactions are from the same experimental study paper by V Vasudevan, RK Hanson, DM Golden, CT Bowman, DF Davidson, J. Phys. Chem. A 2007, 111, 4062-4072.
https://pubs.acs.org/doi/full/10.1021/jp0677187

These two rate coefficients are measured at too-high temperatures (2253--3527 K). For this reason, the reverse reactions of these two rate coefficients show TOTALLY non-reasonable behavior as below

4. CH3 = H + CH2 (NOx 2018, index: 65)

5. CH3 = H2 + CH (NOx 2018, index: 66)

I guess any rate coefficients below 2000 K (maybe even up to 2500 K) are very very off from the real values. Since the reverse reactions are barrierless reactions, the rate coefficients at high T (e.g.,2000 K) shouldn't be different more than an order of magnitude from 500 K or lower T.

Any good thoughts for reactions 3,4, and 5? (Currently, I don't have any good solutions for these reactions)

Locate the five reactions by their listed mechanisms, datasets, and indexes, then compare the stored rate parameters with the cited papers and the reported reverse-reaction behavior. Done means each reaction has a source-backed disposition and any confirmed database corrections are clearly recorded, including a resolution for reactions 3–5.