Does it make any sense that my A/C would blow colder on the driver's side than the passenger side?

Thanks,
Pat

Have you checked to see if all housings are connected properl;y going to the passenger side? Sounds to me maybe one of the vents tubes is not fully connected or may have a slight crack in it heading to the passenger side. Whatdoes it feel like going to the back?

try prestone radiator flush
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Vapor genie review

I believe the heater radiator can clog up. In the UK it is the opposite way round, passenger cold, driver warm, and it's the same heater unit