I wouldn’t base any opinion on this pack from the work I’ve shown. The stuff I posted only used Jacob’s textures, how it tiles and the general UV’ing is all from my inexperienced hands. Also the above was a rush job just to show how this pack helped me with modularity, I mean look at that roof, it’s gross.
The only time I’ve seen a seam in this pack is when my lighting wasn’t set up correctly so perhaps look at that? Failing that, screen shots always help. I will say again though not to judge this pack by my screens. You’re better off loading the example map included with the pack and replicating your issue(s) there if you can.