I'm unable to use any of the links from the other thread. I haven't looked at the actual patch but...
My advice after reading the list of changes and issues:
In changing the text, you may have inadvertently overwritten some "control codes" that handle how characters are presented on screen-- thus the character smiling issue. It's a good idea to compare the original, non-bugged data with what was changed in this situation.
The title screen change and resulting glitch sounds like you've overwritten something important (especially if the new title screen takes up more space than the original...), most likely data or program code directly following the title screen. You may need to relocate the title screen hack to an empty area in the ROM to fix this issue. This usually involves knowledge of using a debugger. You would need to set a break point looking for reads to the ROM address of where the title screen is stored and change any reference to the original data to read from the relocated data. This involves a knowledge of 6502 assembly. Here is a good reference.
Good luck, my friend.