It's a sign you're eating above maintenance. If you don't like how thin you look, and want to gain size regardless of composition, there's nothing wrong with eating a fair bit over maintenance(more than was already recommended).
Being 130lbs lean or with a bit of fat looks exactly the damn same with a shirt on.
That's a fair point. There are certain body fat / muscle mass regions where another pound or two of fat might make you look bigger.
If there's enough mass there already:
at ~10% every bit of fat you lose makes you look bigger (since there is more visible definition).
Conversely, if there isn't much definition at ~12%, going up to ~15% may have you
looking more muscular.