You should be able to set default text style, but for some reason your fonts are not being picked up. I'd follow up as others suggested: create an RTF document in TextEdit on both Macs and make sure it works there. You can even embed the RTF documents in LayOut so updating them will get updated in the LayOut document. File->Insert.
Changing font face on multiple text objects with multiple font sizes may lead to some surprising results, and I have a bug filed on this a while back. The workaround, if you can do it, is to put the text in one text object or in a single RTF file.
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