I cannot match these two names up. Here is what I find:

H B/P. Oliver

Enlisted as a Private
"D" Co. TX 1st Infantry [However, there is no Captain Hart listed in the regiment]

...........

Archie Hart

Enlisted as a Captain
"A" Co. TX 5th Partisan Rangers Cavalry [However, there is no Pvt. Oliver in the regiment]

Do you have anyother information which could help sort this out?

George Martin