a play from my last JV game still bugs me.

[BigFarns]

I had a situation where I was running up the sideline with a back and there is a DB with an angle. One that would have allowed him to get there before the endzone. I can see him coming because of my angle on the play and there is a receiver running with him trying to ruin his angle. I clearly saw him push the DB from the side and the DB goes flying on the ground. With no more threat I simply continue running the last 20 yards and raise my hands when the back scores. I then look back and one of the officials following me calls block in the back. I jog back cause I got a feeling he's calling the block I saw. I confirm the number and then I ask him if he's sure and he said yes. I then look to the white hat and shrug and say I didn't see it that way. They have been officials since like the beginning of time and I'm only in my second year so I let it go. But it's still bothering me. I see how that block was probably "clean up duty" but I could watch it and easily keep up with the runner. Plus beside that one threat noone else was going to catch up and the runner was in no danger of stepping out of bounds...so I watched the block. Was I looking outside my responsiblity? If not, then should I have "overruled" the other official and how? When I asked him if he was sure I simply said "are you sure cause I saw a good block."
I wish I could draw a diagram somehow on this site...it'd be easier for y'all to tell me if I was looking in the wrong spot or not and if I should have pressed what I saw on the play more with the other official.