Maybe a maths geek can help with this, but do the odds change for the our likelihood of getting #2 immediately after #1 has gone to someone else? And do those odds change if it goes to a team with more balls or fewer balls or that doesn't matter?
Yes the odds will change no matter what. They will always improve, but by how much depends.
Here's the math.
There's 1,000 eligible ping pong ball combinations (1,001 total but the last potential combo is ignored).
C's have 250 of them for a 25% chance of #1. 250 / 1000 = 25% chance.
Phoenix has 199 combinations (19.9% chance)
Lakers have 156 combinations (15.6% chance)
All the way down to Miami with 5 combinations (0.5% chance).
Once one of your combinations is selected, all remaining combinations for that spot are eliminated from contention.
So if Phoenix gets #1, then the C's still have 250 combinations, but the total eligible pool of combinations is decreased by 199 down to 801. So now the C's odds of #2 increase to 250 / 801 = 31.2%.
But if Miami gets #1, the potential pool only shrinks by 5, so the C's odds for # 2 are now 250 / 995 = 25.1%.
Starting off, C's have a 25% chance of #1.
If they don't get #1, their odds for #2 increase to somewhere between 25.1% (least likely) and 31.2% (most likely).
If they don't get #1 or #2, their odds for #3 increase to somewhere between 25.3% (least likely) and 38.8% (most likely).