Would a VLAN mismatch cause IP errors on my 6500?

I noticed a couple weeks ago that I am getting errors on my core switch. It is a cisco catalyst 6500. When typing in show ip traffic, i am getting "not a gateway" counters and "bad hop counts". They are increasing daily, I ran a quick debug and noticed that they were coming from a certain subnet (192.168.50.X).

Here it how the previous engineer set it up:

Core - VLAN 50

SVI GW - 192.168.50.245 (it is trunked over to a couple distro switches which composes of the .50 subnet)

On the disto switches for the .50 network, the previous engineer didn't set up vlan 50 on them. When checking these devices, i realized they are programmed like this;

Distro - VLAN 1

IP: 192.168.50.1. 192.168.50.2, 192.168.50.3, etc.

GW For each switch: 192.168.50.1

Would this mismatch be causing all the errors in the core? Im assuming the core is associating 192.168.50.X to GW 192.168.50.245? Is it only working due to the Native VLAN?