I've had it happen both that they didn't stock, that they did and I had no luck, etc.
Last winter I was fishing the Quittie, not among my favorites but kinda in my backyard, it's just an easy place to waste an hour. There were a handful of very visible fish left from the fall stocking in the special reg stretch, they were abused and we all kinda knew them almost by name, lol. But the Feb stocking was published, so I went the week after. And.. Those same fish were there, no new ones. A bunch of guys there saying the same thing. They lied, they must not have stocked, I drove all the way out here for this, etc. Mumbled cuss words.
I went back home, and the PFBC had put out a notice saying the stocking was rescheduled, but you kinda had to dig for it. 2 weeks later they did put em in. But that one trip, yeah, went expecting stocked fish based on the published schedule and it didn't happen.
Another time on Tionesta Creek. This is big water, fish move. Typically. My dad helped them stock, err, tried to. This was a low water year, with no high water events between the stocking and opening day. And in a 4 mile section, when there used to be 4 or 5 stops and stocking points, they made none. Lots of help like always, plenty of guys ready to carry buckets. But the driver said he was in a hurry, they had to have all of the fish stocked in ___ amount of time, and they didn't have the time to make all those stops. So he stopped on the bridge at the top of the 4 mile section, extended the boom, and fish cannoned them all in right there. Took a pictures with some politician, put it on facebook saying what a great job they were doing stocking all those fish for the public. That stretch has a bunch of famous holes all through it, with people lined up on opening day. Few weeks later on opening day, nobody caught a thing. At the bridge hole at the top though it looked like a hatchery raceway and it was a complete zoo. Technically, they DID stock the section they said, with the published number of fish, they just put em all in 1 spot, and with the low water, the fish didn't really move. Probably a higher % of the stocked fish than normal were caught and kept, which is a metric of "success" for the PFBC. But lots of people spread out caught nothing and the only ones catching fish were fighting the zoo scene at the one spot. NOT what I want to teach my kids that fishing is like.
Another time on Oil Creek. It was like June. It was weeks after the last scheduled in season stocking. I was over a mile from the nearest road access, but there's a bike trail that the stocking truck drives, so it's nice to find stocked areas away from easy access. I was fishing, doing okish, as expected, and I heard a vehicle. What the??? Stocking truck arrives. Nice driver said hey there buddy, we had some fish leftover and gotta get rid of them, so we're stocking. You want some fish? Uh, ok... I'm over a mile in, no roads, no people in sight, and there's a fish cannon shooting fish at me. I think I caught 60 and only quit because my arms were sore. But it felt kinda cheap, lol.
Is it a government agency? If so, then it lies.
But, this happens from time to time. We used to have a little "jam" called "Stocktoberfest. And one year right after a stocking, probably 10 of us hit the stream, and nare a one of us caught a lick. Actually, I think Pcray caught one ugly bow, that was it. Didn't even see anything, despite being stocked the day before.
I remember that one, it was similar to above. Where we parked and usually had fish according to the locals, didn't that day. I recognized it for what it was and took off walking, exploring, it was my first time on that stream, and if I wasn't gonna catch fish I was going to learn a new place, you know? I found an obvious access/stocking hole downstream a mile or two, I was the only one to go that far. There was 1 hole with a bunch of fish, and a couple guys had em surrounded, and were catching them. I didn't push in, I kept on going further down, a few holes further and there was an open hole, where I caught my one ugly bow that apparantly had made its way down from the stocking point. They did stock. Just not very well or where our jam crew of locals expected them to.
Stocking points aren't consistent. And sometimes conditions are such that fish move and spread out, that's a good thing (if fishing for the stocked fish). Sometimes they stay right there where they were stocked, and you have 1 hole with a bunch of fish and a lot of water with few or none. If you went to a place last year that had fish, and you go this year expecting the same, it's very possible to be dissapointed.