[Error] bios:206: [string "mine"]:144: ')' expected

I'm thinking that it's just a problem with my syntax.

bios:206: [string "mine"]:144: ')' expected

Here is the line in question (yes I am 100% sure this is the line)

if (xq-xs<50) and (orientation=3) then
xq=xq+1

For comparisons you want to do == to assign a value you do = so it should be

if (xq-xs<50) and (orientation==3) then

Yes, but the problem may also stem from how the parentheses are being used in the (xq-xs<50) bit. I would remove all the parentheses from the line and just use spacing, like:

if xq-xs < 50 and orientation == 3 then

There are times when parentheses are necessary to properly establish (or merely clarify) operation precedence, but they aren't always necessary.