I think there may be something wrong with the G.I. Bill Comparison Tool. I went to a Community College last year (Fall and Spring 2018) and the G.I. Bill Comparison Tool show the housing allowance is $1,799 which is what I got pay each months for those two semester. Just look at the G.I. Bill Comparison Tool a moment ago and now it is showing the housing allowance for that Community College as $1,647. That a different of negative 152 dollar. So yeah there is definitely something wrong with the G.I. Bill Comparison Tool.
Here another thing, I just transfer to a different College in another city for Fall 2018 Semester and my housing allowance according to the G.I. Bill Comparison Tool is 1,350. Today I got pay $1,334 a differences of 16 dollar. Here another things, I start Fall 2018 Semester on 27 August and on August 31, I got pay 177.87. That about $35.574 dollar a day or $1,067.22 for 30 days or $1,102.794 for 31 days if I take 177.87 divide by 5 day. If I take 177.87 divide by 4 I get 44.4675 dollar a day or 1334.025 for 30 days which is what I got pay today (few cents different). Does that mean that I went to school for 5 days in the month of August but only got pay for 4 days? I don't know what last year housing allowance is for this College I just started, but if I remember correctly the new BAH rate start in September for those who started school.