Why a second 't' in the middle of the letters? This I do not know. Why are there three s's and ts to boot? If there were not then the division into two groups of 11 would not work! There would be fewer letters to form the second team. Samech, Tet, Tsade sidelined! How unfair. This turned out to be a much longer post than I anticipated. The highlighted word is significant in Biblical teaching.
In Ruth there are almost more ט letters in the numbering system (9, 15, 16, 19 all have tet as part of the symbol) than there are in the text! But there are a few words - two stand out in particular: טוֹב + יָטַב five times and לָקַט to glean - which gets 10 hits in chapter 2 of Ruth out of of 37 in the Bible. Gleaning and harvest must be a theme of chapter 2 in this book. It sounds as if the story-teller is stressing the gleaning.
So here is the grammar of ט in Ruth. From it we see several forms of the verb, לָקַט. Let us first green the letters that form the affixes.
let me go please to the field and glean grain
)élkah-na) hàsadeh và)alàqa+ah bàshibalym
and she went and she came and she gleaned
vàto)mer )alàqa+ah-na) v)asàpty ba`amarym )àxaréy hàqvocrym
vàtaqam llàqé+ vàycàv bo`àz )et-n`arayv lé)mor gàm béyn ha`amarym tlàqé+
and she gleaned in the field till evening and she beat out what she gleaned
+vob bity ky téc)y `im-nà`arvotayv
my daughter do I not seek for you rest that it may be good for you
כִּי כַלָּתֵךְ אֲשֶׁר-אֲהֵבַתֶךְ יְלָדַתּוּ אֲשֶׁר-הִיא טוֹבָה לָךְ מִשִּׁבְעָה בָּנִים
for your daughter-in-law who loves you and bore him is better to you than seven sons