り can appear as a single stroke or as two depending on the font being used. They're the same character written the same way, just some fonts show the lift of the calligraphy brush around the curve and others show the slight drag.
The much blockier リ is the katakana for the same syllable.
This appears in many of the curved kana
Note the size of the "ya" kana in your answer vs the correct answer. ゃや
The small ゃcombines with the kana before it to alter the sound (introduced in Hiragana 4)
So your answer says てりゃき "te-rya-ki" which is only three syllables, rather than the correct てりやき "te-ri-ya-ki" four syllables.