Yes i have, as on another thread I had issues today with suspected counterfeit parts, they work but not as expected, and not as a known good item.
When you said you had them squashed down to the board, are you saying that was the cause of the problem?, like there was an unintended contact /short, you can do that sometimes with a 78 reg, because the tag is ground, one of my very early projects I grounded the tag of a 79 reg, not knowing the tag was the o/p, oops, is this what happened to you, no shame in that.
You got it working yet then?, your solder job looks perfectly acceptable from the comp side at least.