Darn it with all these threads getting racial all of a sudden ..
My initial reaction is that you are not a reg and some of the table is and backing up their 'friend'.
300 in greens is not a short stack. (12 the last time I checked) If you had them in 100 stacks along the rail then it could be an issue of your left arm blocking some of them.
2 hours is plenty of time for anyone at the table know how you manipulate your stack. Yes, I've been caught off guard by someone's stack being larger or smaller than the last time I 'remembered' it due to forgetting about a hand they were in, but
you should always know how they handle their chips. If you had consistently kept your greens in that spot I would've known to take a peek at them .. or ask.
Whenever I play 1/3 or 2/5 I try to keep more red, but some players don't like all the chips. It still doesn't excuse a player from not knowing the situation.
I would like to flip this around and ask that
if our OP had gone all-in first would anyone's opinion on this change? It very well shouldn't and I'm not interested in getting into the 1-chip all-in discussion. A player verbally says "all-in" and gets snap called before any chips can get put out ... "pay the man his money". GL