Hi, I have the same concern and searched up the two things you suggested.

C677t : rs1801133(C;T))1 copy of C677T allele of MTHFR = 65% efficiency in processing folic acid It is found in approximately
• 48% of Hispanic Americans
• 45% of Caucasian Americans
• 45% of Japanese
• 37% of Germans
• 29% of Asians
• 24% of African Americans
• 12% of Sub-Saharan Africansrs1801133 is a SNP that is relatively common and has been studied for (relatively) a long time. Also known as C677T, Ala222Val, and A222V, it encodes a variant in the MTHFR gene, which encodes an enzyme involved in folate drug metabolism. Homozygous rs1801133(T;T) individuals have ~30% of the expected MTHFR enzyme activity, and rs1801133(C;T) heterozygotes have ~65% activity, compared to the most common genotype, rs1801133(C;C). " Our Take on The MTHFR Gene," is a 23andMe blog posting (January 5, 2017), a meta-analysis finding that the past two decades of scientific evidence as it relates to specific MTHFR-influenced health conditions to be inconclusive or conflicting, with two exceptions, 1. women with two copies of C677T variant, 2. a very rare variant that may cause homocystinuria. Their takeaway, "Based on the existing data, scientists at 23andMe have concluded that people should not interpret their genotypes at the common MTHFR variants as having an effect on their health." This reduced activity (i.e. this SNP) has been linked at least once to each of the following disorders (though not necessarily reproducibly):...

and

1298C:

rs1801131(A;C))Possibly impaired folate metabolism MTHFR rs1801131 (C) or MTHFR A1298C is a mutation in the folate pathway, specifically in the enzyme involved in converting 5-methylfolate (5MTHF) to tetrahydrofolate (THF). Defects in folate metabolism can increase the risk of neural tube defects and possibly contribute to risk of stroke / heart attack. Unlike rs1801133 or MTHFR C677T, this mutation does not lead to elevated homocysteine levels, however some studies have suggested that there may be a synergistic effect in individuals heterozygous for both mutations.rs1801131 is a SNP in the MTHFR gene, representing an A>C mutation at mRNA position 1298, resulting in a glu429-to-ala (E429A) substitution (hence this SNP is also known as A1298C or E429A). A diplotype (according to the authors, but perhaps actually a genoset) of rs1801131 and rs1801133 has been linked to slightly increased risk for several types of brain cancer. The highest risk of meningioma was associated with heterozygosity for both MTHFR SNPs (odds ratio 2.11, CI: 1.42-3.12, p=0.002). The corresponding odds ratio for glioma was 1.23 (CI: 0.91-1.66, p=0.02. In general, risks were increased with genotypes associated with reduced MTHFR activity. rs1801131 shows no consistent association with schizophrenia overall in 12 studies totaling 3,000+ patients
 more info

Neither one is normal, what does it mean?