Only one filter per mode is stored in tablist-named-filter

[a13]

Sorry if I do it the wrong way, but documentation isn't clear here.

What I'm trying to do is to add multiple filters interactively

1. interactively tablist-edit-filter, put something like name == tmp there
2. name it qaz with tablist-name-current-filter
   as a result,
   tablist-named-filter is ((navigel-tablist-mode ("qaz" == "name" "tmp")))

so everything looks fine, and (tablist-filter-names) returns ("qaz")

now I'm trying to add another filter

1. interactively tablist-edit-filter, put something like name == opt there
2. name it wsx with tablist-name-current-filter

expected result:

(tablist-filter-names) returns ("qaz wsx")

actual result
(tablist-filter-names) returns ("wsx")

non-interactive tablist-put-named-filter works the same way - it stores the last filter only

I use tablist-20200427.2205 from MELPA.