Scolling glitches on repro

Ive made a repro of Jason vs Freddy. Cool Friday the 13th hack.http://bootgod.dyndns.org:7777/profile.php?id=176 Ive made sure the mirroring is correct and checked all traces. mirroring set to Vertical. Everything looks fine with the cart and solder. Used two M27C512 eproms(x2 prg, chr). Q Bert as the donor.http://bootgod.dyndns.org:7777/profile.php?id=110
The game plays fine but one the left and right of the screen its glitching out. Ill share video with my phone in a few. Easy than explain it. Any ideas please help. Thanks.

Video soon:

Did you jumper the H pads?

IIRC the way Nintendo did it is a bit backwards from what you'd think. H is soldered closed for Vertical mirror, and V for Horizontal.

That is the issue! Thanks. Rookie mistake again:p