Hello,

The unicode letters for 'varphi' and for 'phi' are swapped.

Here is a patch correcting this:

diff --git a/lisp/org-entities.el b/lisp/org-entities.el
index 4044432..6f6d054 100644
--- a/lisp/org-entities.el
+++ b/lisp/org-entities.el
@@ -204,9 +204,8 @@ packages to be loaded, add these packages to
`org-latex-packages-alist'."
     ("upsih" "\\Upsilon" t "ϒ" "upsilon" "upsilon" "ϒ")
     ("upsilon" "\\upsilon" t "υ" "upsilon" "upsilon" "υ")
     ("Phi" "\\Phi" t "Φ" "Phi" "Phi" "Φ")
-    ("phi" "\\phi" t "φ" "phi" "phi" "φ")
-    ("varphi" "\\varphi" t "ϕ" "varphi" "varphi" "ɸ")
+    ("phi" "\\phi" t "φ" "phi" "phi" "ɸ")
+    ("varphi" "\\varphi" t "ϕ" "varphi" "varphi" "φ")
     ("Chi" "X" nil "Χ" "Chi" "Chi" "Χ")
     ("chi" "\\chi" t "χ" "chi" "chi" "χ")
     ("acutex" "\\acute x" t "´x" "'x" "'x" "𝑥́")

Thanks,
Kosta