Unfortunately, not everyone can be pleased. The FOP2 Extension parses any number on a web page.. Web page semantics are not consistent, so saying that fields are text but has number do not make much sense from a semantic point of view when analysing a web page content by scripts. In a web page that "text" field is just some other text, the same as number fields.
The extension is meant to convert numbers of determined lengths, with some punctuation allowed, to be converted to click to call links. And it is doing its job.
Best regards,