Non-contact interference / obstruction

[Dakota]

Last night. Two pretty good 16U rec league teams. ("Pretty good" in the context of a rec league.) 1 umpire "system."

R1 on 2nd. Hump-backed liner goes toward the deep infield between 2nd base and F6. R1 off and running; F6 running to catch the ball. Players on a collision course. Both hold up inches from contact. Ball drops uncaught.

IMJ, F6 had a good shot at the catch. I ruled dead ball, interference, runner out.

Inning later. Same situation almost exactly. Only this time, the ball is a bit higher and, IMJ, over F6's head (i.e. she had no shot). I did not rule any violation. D-coach wanted to know the difference (between innings - no jawing during the game). I explained F6 had no play, hence no interference. I thought later I should have called obstruction (it would have made no difference in the play).

Comments?