"A#" written under "ARC" at POE. Normal or NOT?

[delly1984]

Unlike previous short leave, this time my trip lasts 5 month and half. When I entered POE, I told the truth to the officer and he seemd nice and said nothing but ok. And every step seemd ok and normal except my "A#" was written under "ARC".

My previous entry records have "ARC" ONLY. No "A#".

Is this normal or it's a warning or something?
thank you

 

[TheRealCanadian]

It's a warning that you worry excessively over nothing.

 

[BigJoe5]

CBP was making sure that you could not swap a copy of that stamped passport page showing a 5 month absence for someone else's 6+ month trip.

 

[cafeconleche]

I don't know, they sometimes do that.

 

[Triple Citizen]

Early signs of paranoia. Nothing to worry about

Is this normal or it's a warning or something?