When Louie is on Facebook looking for Tammy, the profile he is logged on to belongs to an Amy Silver, possibly the show's production designer.
The 'history' that Rick tells of the origin of the word 'faggot' is an old wives' tale and completely false. Gay men were NOT thrown onto piles of burning wood, or 'faggots', during witch trial days. The term faggot does literally mean 'a bundle of sticks,' and in the 1600's women were often pejoratively called 'faggot gatherers' as a term denoting their low societal worth. This was then shortened simply to 'faggots', and then carried over as an insult towards effeminate men or men perceived to be gay. It eventually fell out of use as women's status in society changed, but continues to be used as a slur towards gay men in present day. Historically almost all terms used towards gay or effeminate men originated as words for women: sissy, nancy or queen being prominent other examples.
Louie as a kid has blue eyes. Louie as an adult has brown eyes.
In the flashback scenes, Louie is a redheaded kid with blue eyes. Louie has brown eyes.