Hello @JamesL4 ,
I'm not able to recreate any of the issues described when testing in your account, nor in mine.
For the type/paste multiple and file upload methods, when I typed partial list names in your account, they showed, and I was able to select them without issue. I also had no issue displaying the full names, as even your longest contact list name simply included the rest of its letters and contact number total onto a second line.
The same was also for the single add method, as the longest list name simply made multiple lines to accommodate all of the letters and the contact total.
Have you tried zooming out on your browser screen (CTRL - on PC, CMD - on Mac), or widening it to make sure it fills your screen? If your browser window cannot accommodate all the wording on a webpage (whether due to the size of the window or the text and graphics), text is going to start getting cutoff, abbreviated, etc. across most sites.
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